* re_*comp and friends - compile REs
* This file #includes several others (see the bottom).
*
- * Copyright (c) 1998, 1999 Henry Spencer. All rights reserved.
- *
+ * Copyright (c) 1998, 1999 Henry Spencer. All rights reserved.
+ *
* Development of this software was funded, in part, by Cray Research Inc.,
* UUNET Communications Services Inc., Sun Microsystems Inc., and Scriptics
* Corporation, none of whom are responsible for the results. The author
- * thanks all of them.
- *
+ * thanks all of them.
+ *
* Redistribution and use in source and binary forms -- with or without
* modification -- are permitted for any purpose, provided that
* redistributions in source form retain this entire copyright notice and
* indicate the origin and nature of any modifications.
- *
+ *
* I'd appreciate being given credit for this package in the documentation
* of software which uses it, but that is not a requirement.
- *
+ *
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
- * $Header: /projects/cvsroot/pgsql-server/src/backend/regex/regcomp.c,v 1.38 2003/08/08 21:41:56 momjian Exp $
- *
*/
#include "regguts.h"
/*
* forward declarations, up here so forward datatypes etc. are defined early
*/
+/* =====^!^===== begin forwards =====^!^===== */
+/* automatically gathered by fwd; do not hand-edit */
/* === regcomp.c === */
-static void moresubs(struct vars *, int);
-static int freev(struct vars *, int);
-static void makesearch(struct vars *, struct nfa *);
-static struct subre *parse(struct vars *, int, int, struct state *, struct state *);
-static struct subre *parsebranch(struct vars *, int, int, struct state *, struct state *, int);
-static void parseqatom(struct vars *, int, int, struct state *, struct state *, struct subre *);
-static void nonword(struct vars *, int, struct state *, struct state *);
-static void word(struct vars *, int, struct state *, struct state *);
-static int scannum(struct vars *);
-static void repeat(struct vars *, struct state *, struct state *, int, int);
-static void bracket(struct vars *, struct state *, struct state *);
-static void cbracket(struct vars *, struct state *, struct state *);
-static void brackpart(struct vars *, struct state *, struct state *);
-static chr *scanplain(struct vars *);
-static void leaders(struct vars *, struct cvec *);
-static void onechr(struct vars *, chr, struct state *, struct state *);
-static void dovec(struct vars *, struct cvec *, struct state *, struct state *);
-static celt nextleader(struct vars *, chr, chr);
-static void wordchrs(struct vars *);
-static struct subre *subre(struct vars *, int, int, struct state *, struct state *);
-static void freesubre(struct vars *, struct subre *);
-static void freesrnode(struct vars *, struct subre *);
-static void optst(struct vars *, struct subre *);
-static int numst(struct subre *, int);
-static void markst(struct subre *);
-static void cleanst(struct vars *);
-static long nfatree(struct vars *, struct subre *, FILE *);
-static long nfanode(struct vars *, struct subre *, FILE *);
-static int newlacon(struct vars *, struct state *, struct state *, int);
-static void freelacons(struct subre *, int);
-static void rfree(regex_t *);
-
+int compile _ANSI_ARGS_((regex_t *, CONST chr *, size_t, int));
+static VOID moresubs _ANSI_ARGS_((struct vars *, int));
+static int freev _ANSI_ARGS_((struct vars *, int));
+static VOID makesearch _ANSI_ARGS_((struct vars *, struct nfa *));
+static struct subre *parse _ANSI_ARGS_((struct vars *, int, int, struct state *, struct state *));
+static struct subre *parsebranch _ANSI_ARGS_((struct vars *, int, int, struct state *, struct state *, int));
+static VOID parseqatom _ANSI_ARGS_((struct vars *, int, int, struct state *, struct state *, struct subre *));
+static VOID nonword _ANSI_ARGS_((struct vars *, int, struct state *, struct state *));
+static VOID word _ANSI_ARGS_((struct vars *, int, struct state *, struct state *));
+static int scannum _ANSI_ARGS_((struct vars *));
+static VOID repeat _ANSI_ARGS_((struct vars *, struct state *, struct state *, int, int));
+static VOID bracket _ANSI_ARGS_((struct vars *, struct state *, struct state *));
+static VOID cbracket _ANSI_ARGS_((struct vars *, struct state *, struct state *));
+static VOID brackpart _ANSI_ARGS_((struct vars *, struct state *, struct state *));
+static chr *scanplain _ANSI_ARGS_((struct vars *));
+static VOID leaders _ANSI_ARGS_((struct vars *, struct cvec *));
+static VOID onechr _ANSI_ARGS_((struct vars *, pchr, struct state *, struct state *));
+static VOID dovec _ANSI_ARGS_((struct vars *, struct cvec *, struct state *, struct state *));
+static celt nextleader _ANSI_ARGS_((struct vars *, pchr, pchr));
+static VOID wordchrs _ANSI_ARGS_((struct vars *));
+static struct subre *subre _ANSI_ARGS_((struct vars *, int, int, struct state *, struct state *));
+static VOID freesubre _ANSI_ARGS_((struct vars *, struct subre *));
+static VOID freesrnode _ANSI_ARGS_((struct vars *, struct subre *));
+static VOID optst _ANSI_ARGS_((struct vars *, struct subre *));
+static int numst _ANSI_ARGS_((struct subre *, int));
+static VOID markst _ANSI_ARGS_((struct subre *));
+static VOID cleanst _ANSI_ARGS_((struct vars *));
+static long nfatree _ANSI_ARGS_((struct vars *, struct subre *, FILE *));
+static long nfanode _ANSI_ARGS_((struct vars *, struct subre *, FILE *));
+static int newlacon _ANSI_ARGS_((struct vars *, struct state *, struct state *, int));
+static VOID freelacons _ANSI_ARGS_((struct subre *, int));
+static VOID rfree _ANSI_ARGS_((regex_t *));
+static VOID dump _ANSI_ARGS_((regex_t *, FILE *));
+static VOID dumpst _ANSI_ARGS_((struct subre *, FILE *, int));
+static VOID stdump _ANSI_ARGS_((struct subre *, FILE *, int));
+static char *stid _ANSI_ARGS_((struct subre *, char *, size_t));
+/* === regc_lex.c === */
+static VOID lexstart _ANSI_ARGS_((struct vars *));
+static VOID prefixes _ANSI_ARGS_((struct vars *));
+static VOID lexnest _ANSI_ARGS_((struct vars *, chr *, chr *));
+static VOID lexword _ANSI_ARGS_((struct vars *));
+static int next _ANSI_ARGS_((struct vars *));
+static int lexescape _ANSI_ARGS_((struct vars *));
+static chr lexdigits _ANSI_ARGS_((struct vars *, int, int, int));
+static int brenext _ANSI_ARGS_((struct vars *, pchr));
+static VOID skip _ANSI_ARGS_((struct vars *));
+static chr newline _ANSI_ARGS_((NOPARMS));
#ifdef REG_DEBUG
-static void dump(regex_t *, FILE *);
-static void dumpst(struct subre *, FILE *, int);
-static void stdump(struct subre *, FILE *, int);
-static char *stid(struct subre *, char *, size_t);
+static chr *ch _ANSI_ARGS_((NOPARMS));
#endif
-/* === regc_lex.c === */
-static void lexstart(struct vars *);
-static void prefixes(struct vars *);
-static void lexnest(struct vars *, chr *, chr *);
-static void lexword(struct vars *);
-static int next(struct vars *);
-static int lexescape(struct vars *);
-static chr lexdigits(struct vars *, int, int, int);
-static int brenext(struct vars *, chr);
-static void skip(struct vars *);
-static chr newline(void);
-static chr chrnamed(struct vars *, chr *, chr *, chr);
-
+static chr chrnamed _ANSI_ARGS_((struct vars *, chr *, chr *, pchr));
/* === regc_color.c === */
-static void initcm(struct vars *, struct colormap *);
-static void freecm(struct colormap *);
-static void cmtreefree(struct colormap *, union tree *, int);
-static color setcolor(struct colormap *, chr, pcolor);
-static color maxcolor(struct colormap *);
-static color newcolor(struct colormap *);
-static void freecolor(struct colormap *, pcolor);
-static color pseudocolor(struct colormap *);
-static color subcolor(struct colormap *, chr c);
-static color newsub(struct colormap *, pcolor);
-static void subrange(struct vars *, chr, chr, struct state *, struct state *);
-static void subblock(struct vars *, chr, struct state *, struct state *);
-static void okcolors(struct nfa *, struct colormap *);
-static void colorchain(struct colormap *, struct arc *);
-static void uncolorchain(struct colormap *, struct arc *);
-static int singleton(struct colormap *, chr c);
-static void rainbow(struct nfa *, struct colormap *, int, pcolor, struct state *, struct state *);
-static void colorcomplement(struct nfa *, struct colormap *, int, struct state *, struct state *, struct state *);
-
+static VOID initcm _ANSI_ARGS_((struct vars *, struct colormap *));
+static VOID freecm _ANSI_ARGS_((struct colormap *));
+static VOID cmtreefree _ANSI_ARGS_((struct colormap *, union tree *, int));
+static color setcolor _ANSI_ARGS_((struct colormap *, pchr, pcolor));
+static color maxcolor _ANSI_ARGS_((struct colormap *));
+static color newcolor _ANSI_ARGS_((struct colormap *));
+static VOID freecolor _ANSI_ARGS_((struct colormap *, pcolor));
+static color pseudocolor _ANSI_ARGS_((struct colormap *));
+static color subcolor _ANSI_ARGS_((struct colormap *, pchr c));
+static color newsub _ANSI_ARGS_((struct colormap *, pcolor));
+static VOID subrange _ANSI_ARGS_((struct vars *, pchr, pchr, struct state *, struct state *));
+static VOID subblock _ANSI_ARGS_((struct vars *, pchr, struct state *, struct state *));
+static VOID okcolors _ANSI_ARGS_((struct nfa *, struct colormap *));
+static VOID colorchain _ANSI_ARGS_((struct colormap *, struct arc *));
+static VOID uncolorchain _ANSI_ARGS_((struct colormap *, struct arc *));
+static int singleton _ANSI_ARGS_((struct colormap *, pchr c));
+static VOID rainbow _ANSI_ARGS_((struct nfa *, struct colormap *, int, pcolor, struct state *, struct state *));
+static VOID colorcomplement _ANSI_ARGS_((struct nfa *, struct colormap *, int, struct state *, struct state *, struct state *));
#ifdef REG_DEBUG
-static void dumpcolors(struct colormap *, FILE *);
-static void fillcheck(struct colormap *, union tree *, int, FILE *);
-static void dumpchr(chr, FILE *);
+static VOID dumpcolors _ANSI_ARGS_((struct colormap *, FILE *));
+static VOID fillcheck _ANSI_ARGS_((struct colormap *, union tree *, int, FILE *));
+static VOID dumpchr _ANSI_ARGS_((pchr, FILE *));
#endif
/* === regc_nfa.c === */
-static struct nfa *newnfa(struct vars *, struct colormap *, struct nfa *);
-static void freenfa(struct nfa *);
-static struct state *newstate(struct nfa *);
-static struct state *newfstate(struct nfa *, int flag);
-static void dropstate(struct nfa *, struct state *);
-static void freestate(struct nfa *, struct state *);
-static void destroystate(struct nfa *, struct state *);
-static void newarc(struct nfa *, int, pcolor, struct state *, struct state *);
-static struct arc *allocarc(struct nfa *, struct state *);
-static void freearc(struct nfa *, struct arc *);
-static struct arc *findarc(struct state *, int, pcolor);
-static void cparc(struct nfa *, struct arc *, struct state *, struct state *);
-static void moveins(struct nfa *, struct state *, struct state *);
-static void copyins(struct nfa *, struct state *, struct state *);
-static void moveouts(struct nfa *, struct state *, struct state *);
-static void copyouts(struct nfa *, struct state *, struct state *);
-static void cloneouts(struct nfa *, struct state *, struct state *, struct state *, int);
-static void delsub(struct nfa *, struct state *, struct state *);
-static void deltraverse(struct nfa *, struct state *, struct state *);
-static void dupnfa(struct nfa *, struct state *, struct state *, struct state *, struct state *);
-static void duptraverse(struct nfa *, struct state *, struct state *);
-static void cleartraverse(struct nfa *, struct state *);
-static void specialcolors(struct nfa *);
-static long optimize(struct nfa *, FILE *);
-static void pullback(struct nfa *, FILE *);
-static int pull(struct nfa *, struct arc *);
-static void pushfwd(struct nfa *, FILE *);
-static int push(struct nfa *, struct arc *);
-
-#define INCOMPATIBLE 1 /* destroys arc */
-#define SATISFIED 2 /* constraint satisfied */
-#define COMPATIBLE 3 /* compatible but not satisfied yet */
-static int combine(struct arc *, struct arc *);
-static void fixempties(struct nfa *, FILE *);
-static int unempty(struct nfa *, struct arc *);
-static void cleanup(struct nfa *);
-static void markreachable(struct nfa *, struct state *, struct state *, struct state *);
-static void markcanreach(struct nfa *, struct state *, struct state *, struct state *);
-static long analyze(struct nfa *);
-static void compact(struct nfa *, struct cnfa *);
-static void carcsort(struct carc *, struct carc *);
-static void freecnfa(struct cnfa *);
-static void dumpnfa(struct nfa *, FILE *);
-
+static struct nfa *newnfa _ANSI_ARGS_((struct vars *, struct colormap *, struct nfa *));
+static VOID freenfa _ANSI_ARGS_((struct nfa *));
+static struct state *newstate _ANSI_ARGS_((struct nfa *));
+static struct state *newfstate _ANSI_ARGS_((struct nfa *, int flag));
+static VOID dropstate _ANSI_ARGS_((struct nfa *, struct state *));
+static VOID freestate _ANSI_ARGS_((struct nfa *, struct state *));
+static VOID destroystate _ANSI_ARGS_((struct nfa *, struct state *));
+static VOID newarc _ANSI_ARGS_((struct nfa *, int, pcolor, struct state *, struct state *));
+static struct arc *allocarc _ANSI_ARGS_((struct nfa *, struct state *));
+static VOID freearc _ANSI_ARGS_((struct nfa *, struct arc *));
+static struct arc *findarc _ANSI_ARGS_((struct state *, int, pcolor));
+static VOID cparc _ANSI_ARGS_((struct nfa *, struct arc *, struct state *, struct state *));
+static VOID moveins _ANSI_ARGS_((struct nfa *, struct state *, struct state *));
+static VOID copyins _ANSI_ARGS_((struct nfa *, struct state *, struct state *));
+static VOID moveouts _ANSI_ARGS_((struct nfa *, struct state *, struct state *));
+static VOID copyouts _ANSI_ARGS_((struct nfa *, struct state *, struct state *));
+static VOID cloneouts _ANSI_ARGS_((struct nfa *, struct state *, struct state *, struct state *, int));
+static VOID delsub _ANSI_ARGS_((struct nfa *, struct state *, struct state *));
+static VOID deltraverse _ANSI_ARGS_((struct nfa *, struct state *, struct state *));
+static VOID dupnfa _ANSI_ARGS_((struct nfa *, struct state *, struct state *, struct state *, struct state *));
+static VOID duptraverse _ANSI_ARGS_((struct nfa *, struct state *, struct state *));
+static VOID cleartraverse _ANSI_ARGS_((struct nfa *, struct state *));
+static VOID specialcolors _ANSI_ARGS_((struct nfa *));
+static long optimize _ANSI_ARGS_((struct nfa *, FILE *));
+static VOID pullback _ANSI_ARGS_((struct nfa *, FILE *));
+static int pull _ANSI_ARGS_((struct nfa *, struct arc *));
+static VOID pushfwd _ANSI_ARGS_((struct nfa *, FILE *));
+static int push _ANSI_ARGS_((struct nfa *, struct arc *));
+#define INCOMPATIBLE 1 /* destroys arc */
+#define SATISFIED 2 /* constraint satisfied */
+#define COMPATIBLE 3 /* compatible but not satisfied yet */
+static int combine _ANSI_ARGS_((struct arc *, struct arc *));
+static VOID fixempties _ANSI_ARGS_((struct nfa *, FILE *));
+static int unempty _ANSI_ARGS_((struct nfa *, struct arc *));
+static VOID cleanup _ANSI_ARGS_((struct nfa *));
+static VOID markreachable _ANSI_ARGS_((struct nfa *, struct state *, struct state *, struct state *));
+static VOID markcanreach _ANSI_ARGS_((struct nfa *, struct state *, struct state *, struct state *));
+static long analyze _ANSI_ARGS_((struct nfa *));
+static VOID compact _ANSI_ARGS_((struct nfa *, struct cnfa *));
+static VOID carcsort _ANSI_ARGS_((struct carc *, struct carc *));
+static VOID freecnfa _ANSI_ARGS_((struct cnfa *));
+static VOID dumpnfa _ANSI_ARGS_((struct nfa *, FILE *));
+#ifdef REG_DEBUG
+static VOID dumpstate _ANSI_ARGS_((struct state *, FILE *));
+static VOID dumparcs _ANSI_ARGS_((struct state *, FILE *));
+static int dumprarcs _ANSI_ARGS_((struct arc *, struct state *, FILE *, int));
+static VOID dumparc _ANSI_ARGS_((struct arc *, struct state *, FILE *));
+#endif
+static VOID dumpcnfa _ANSI_ARGS_((struct cnfa *, FILE *));
#ifdef REG_DEBUG
-static void dumpstate(struct state *, FILE *);
-static void dumparcs(struct state *, FILE *);
-static int dumprarcs(struct arc *, struct state *, FILE *, int);
-static void dumparc(struct arc *, struct state *, FILE *);
-static void dumpcnfa(struct cnfa *, FILE *);
-static void dumpcstate(int, struct carc *, struct cnfa *, FILE *);
+static VOID dumpcstate _ANSI_ARGS_((int, struct carc *, struct cnfa *, FILE *));
#endif
/* === regc_cvec.c === */
-static struct cvec *newcvec(int, int, int);
-static struct cvec *clearcvec(struct cvec *);
-static void addchr(struct cvec *, chr);
-static void addrange(struct cvec *, chr, chr);
-static void addmcce(struct cvec *, chr *, chr *);
-static int haschr(struct cvec *, chr);
-static struct cvec *getcvec(struct vars *, int, int, int);
-static void freecvec(struct cvec *);
-
+static struct cvec *newcvec _ANSI_ARGS_((int, int, int));
+static struct cvec *clearcvec _ANSI_ARGS_((struct cvec *));
+static VOID addchr _ANSI_ARGS_((struct cvec *, pchr));
+static VOID addrange _ANSI_ARGS_((struct cvec *, pchr, pchr));
+static VOID addmcce _ANSI_ARGS_((struct cvec *, chr *, chr *));
+static int haschr _ANSI_ARGS_((struct cvec *, pchr));
+static struct cvec *getcvec _ANSI_ARGS_((struct vars *, int, int, int));
+static VOID freecvec _ANSI_ARGS_((struct cvec *));
/* === regc_locale.c === */
-static int wx_isdigit(wx_wchar c);
-static int wx_isalpha(wx_wchar c);
-static int wx_isalnum(wx_wchar c);
-static int wx_isupper(wx_wchar c);
-static int wx_islower(wx_wchar c);
-static int wx_isgraph(wx_wchar c);
-static int wx_ispunct(wx_wchar c);
-static int wx_isspace(wx_wchar c);
-static wx_wchar wx_toupper(wx_wchar c);
-static wx_wchar wx_tolower(wx_wchar c);
-static int nmcces(struct vars *);
-static int nleaders(struct vars *);
-static struct cvec *allmcces(struct vars *, struct cvec *);
-static celt element(struct vars *, chr *, chr *);
-static struct cvec *range(struct vars *, celt, celt, int);
-static int before(celt, celt);
-static struct cvec *eclass(struct vars *, celt, int);
-static struct cvec *cclass(struct vars *, chr *, chr *, int);
-static struct cvec *allcases(struct vars *, chr);
-static int cmp(const chr *, const chr *, size_t);
-static int casecmp(const chr *, const chr *, size_t);
+static int nmcces _ANSI_ARGS_((struct vars *));
+static int nleaders _ANSI_ARGS_((struct vars *));
+static struct cvec *allmcces _ANSI_ARGS_((struct vars *, struct cvec *));
+static celt element _ANSI_ARGS_((struct vars *, chr *, chr *));
+static struct cvec *range _ANSI_ARGS_((struct vars *, celt, celt, int));
+static int before _ANSI_ARGS_((celt, celt));
+static struct cvec *eclass _ANSI_ARGS_((struct vars *, celt, int));
+static struct cvec *cclass _ANSI_ARGS_((struct vars *, chr *, chr *, int));
+static struct cvec *allcases _ANSI_ARGS_((struct vars *, pchr));
+static int cmp _ANSI_ARGS_((CONST chr *, CONST chr *, size_t));
+static int casecmp _ANSI_ARGS_((CONST chr *, CONST chr *, size_t));
+/* automatically gathered by fwd; do not hand-edit */
+/* =====^!^===== end forwards =====^!^===== */
+
/* internal variables, bundled for easy passing around */
-struct vars
-{
- regex_t *re;
- chr *now; /* scan pointer into string */
- chr *stop; /* end of string */
- chr *savenow; /* saved now and stop for "subroutine
- * call" */
- chr *savestop;
- int err; /* error code (0 if none) */
- int cflags; /* copy of compile flags */
- int lasttype; /* type of previous token */
- int nexttype; /* type of next token */
- chr nextvalue; /* value (if any) of next token */
- int lexcon; /* lexical context type (see lex.c) */
- int nsubexp; /* subexpression count */
- struct subre **subs; /* subRE pointer vector */
- size_t nsubs; /* length of vector */
+struct vars {
+ regex_t *re;
+ chr *now; /* scan pointer into string */
+ chr *stop; /* end of string */
+ chr *savenow; /* saved now and stop for "subroutine call" */
+ chr *savestop;
+ int err; /* error code (0 if none) */
+ int cflags; /* copy of compile flags */
+ int lasttype; /* type of previous token */
+ int nexttype; /* type of next token */
+ chr nextvalue; /* value (if any) of next token */
+ int lexcon; /* lexical context type (see lex.c) */
+ int nsubexp; /* subexpression count */
+ struct subre **subs; /* subRE pointer vector */
+ size_t nsubs; /* length of vector */
struct subre *sub10[10]; /* initial vector, enough for most */
- struct nfa *nfa; /* the NFA */
- struct colormap *cm; /* character color map */
- color nlcolor; /* color of newline */
- struct state *wordchrs; /* state in nfa holding word-char outarcs */
- struct subre *tree; /* subexpression tree */
+ struct nfa *nfa; /* the NFA */
+ struct colormap *cm; /* character color map */
+ color nlcolor; /* color of newline */
+ struct state *wordchrs; /* state in nfa holding word-char outarcs */
+ struct subre *tree; /* subexpression tree */
struct subre *treechain; /* all tree nodes allocated */
struct subre *treefree; /* any free tree nodes */
- int ntree; /* number of tree nodes */
- struct cvec *cv; /* interface cvec */
- struct cvec *cv2; /* utility cvec */
- struct cvec *mcces; /* collating-element information */
-#define ISCELEADER(v,c) (v->mcces != NULL && haschr(v->mcces, (c)))
+ int ntree; /* number of tree nodes */
+ struct cvec *cv; /* interface cvec */
+ struct cvec *cv2; /* utility cvec */
+ struct cvec *mcces; /* collating-element information */
+# define ISCELEADER(v,c) (v->mcces != NULL && haschr(v->mcces, (c)))
struct state *mccepbegin; /* in nfa, start of MCCE prototypes */
- struct state *mccepend; /* in nfa, end of MCCE prototypes */
- struct subre *lacons; /* lookahead-constraint vector */
- int nlacons; /* size of lacons */
+ struct state *mccepend; /* in nfa, end of MCCE prototypes */
+ struct subre *lacons; /* lookahead-constraint vector */
+ int nlacons; /* size of lacons */
};
/* parsing macros; most know that `v' is the struct vars pointer */
-#define NEXT() (next(v)) /* advance by one token */
-#define SEE(t) (v->nexttype == (t)) /* is next token this? */
-#define EAT(t) (SEE(t) && next(v)) /* if next is this, swallow it */
-#define VISERR(vv) ((vv)->err != 0) /* have we seen an error yet? */
-#define ISERR() VISERR(v)
-#define VERR(vv,e) ((vv)->nexttype = EOS, ((vv)->err) ? (vv)->err :\
+#define NEXT() (next(v)) /* advance by one token */
+#define SEE(t) (v->nexttype == (t)) /* is next token this? */
+#define EAT(t) (SEE(t) && next(v)) /* if next is this, swallow it */
+#define VISERR(vv) ((vv)->err != 0) /* have we seen an error yet? */
+#define ISERR() VISERR(v)
+#define VERR(vv,e) ((vv)->nexttype = EOS, ((vv)->err) ? (vv)->err :\
((vv)->err = (e)))
-#define ERR(e) VERR(v, e) /* record an error */
-#define NOERR() {if (ISERR()) return;} /* if error seen, return */
-#define NOERRN() {if (ISERR()) return NULL;} /* NOERR with retval */
-#define NOERRZ() {if (ISERR()) return 0;} /* NOERR with retval */
-#define INSIST(c, e) ((c) ? 0 : ERR(e)) /* if condition false,
- * error */
-#define NOTE(b) (v->re->re_info |= (b)) /* note visible condition */
-#define EMPTYARC(x, y) newarc(v->nfa, EMPTY, 0, x, y)
+#define ERR(e) VERR(v, e) /* record an error */
+#define NOERR() {if (ISERR()) return;} /* if error seen, return */
+#define NOERRN() {if (ISERR()) return NULL;} /* NOERR with retval */
+#define NOERRZ() {if (ISERR()) return 0;} /* NOERR with retval */
+#define INSIST(c, e) ((c) ? 0 : ERR(e)) /* if condition false, error */
+#define NOTE(b) (v->re->re_info |= (b)) /* note visible condition */
+#define EMPTYARC(x, y) newarc(v->nfa, EMPTY, 0, x, y)
/* token type codes, some also used as NFA arc types */
-#define EMPTY 'n' /* no token present */
-#define EOS 'e' /* end of string */
-#define PLAIN 'p' /* ordinary character */
-#define DIGIT 'd' /* digit (in bound) */
-#define BACKREF 'b' /* back reference */
-#define COLLEL 'I' /* start of [. */
-#define ECLASS 'E' /* start of [= */
-#define CCLASS 'C' /* start of [: */
-#define END 'X' /* end of [. [= [: */
-#define RANGE 'R' /* - within [] which might be range delim. */
-#define LACON 'L' /* lookahead constraint subRE */
-#define AHEAD 'a' /* color-lookahead arc */
-#define BEHIND 'r' /* color-lookbehind arc */
-#define WBDRY 'w' /* word boundary constraint */
-#define NWBDRY 'W' /* non-word-boundary constraint */
-#define SBEGIN 'A' /* beginning of string (even if not BOL) */
-#define SEND 'Z' /* end of string (even if not EOL) */
-#define PREFER 'P' /* length preference */
+#define EMPTY 'n' /* no token present */
+#define EOS 'e' /* end of string */
+#define PLAIN 'p' /* ordinary character */
+#define DIGIT 'd' /* digit (in bound) */
+#define BACKREF 'b' /* back reference */
+#define COLLEL 'I' /* start of [. */
+#define ECLASS 'E' /* start of [= */
+#define CCLASS 'C' /* start of [: */
+#define END 'X' /* end of [. [= [: */
+#define RANGE 'R' /* - within [] which might be range delim. */
+#define LACON 'L' /* lookahead constraint subRE */
+#define AHEAD 'a' /* color-lookahead arc */
+#define BEHIND 'r' /* color-lookbehind arc */
+#define WBDRY 'w' /* word boundary constraint */
+#define NWBDRY 'W' /* non-word-boundary constraint */
+#define SBEGIN 'A' /* beginning of string (even if not BOL) */
+#define SEND 'Z' /* end of string (even if not EOL) */
+#define PREFER 'P' /* length preference */
/* is an arc colored, and hence on a color chain? */
-#define COLORED(a) ((a)->type == PLAIN || (a)->type == AHEAD || \
+#define COLORED(a) ((a)->type == PLAIN || (a)->type == AHEAD || \
(a)->type == BEHIND)
/* static function list */
static struct fns functions = {
- rfree, /* regfree insides */
+ rfree, /* regfree insides */
};
/*
- * regcomp - compile regular expression
+ - compile - compile regular expression
+ ^ int compile(regex_t *, CONST chr *, size_t, int);
*/
int
-regcomp(regex_t *re,
- const chr *string,
- int flags)
-{
-
- size_t nLen = 0;
- chr* s2 = (chr*) string;
-
- if (string && *string)
- {
- while(*++s2);
- }
-
- nLen = ((s2 - string) / sizeof(chr));
-
- return wx_regcomp(re, string, nLen, flags);
-}
-int
-wx_regcomp(regex_t *re,
- const chr *string,
- size_t len,
- int flags)
+compile(re, string, len, flags)
+regex_t *re;
+CONST chr *string;
+size_t len;
+int flags;
{
struct vars var;
struct vars *v = &var;
struct guts *g;
- int i;
- size_t j;
-
-#ifdef REG_DEBUG
- FILE *debug = (flags & REG_PROGRESS) ? stdout : (FILE *) NULL;
-
-#else
- FILE *debug = (FILE *) NULL;
-#endif
-
-#define CNOERR() { if (ISERR()) return freev(v, v->err); }
+ int i;
+ size_t j;
+ FILE *debug = (flags®_PROGRESS) ? stdout : (FILE *)NULL;
+# define CNOERR() { if (ISERR()) return freev(v, v->err); }
/* sanity checks */
if (re == NULL || string == NULL)
return REG_INVARG;
- if ((flags & REG_QUOTE) &&
- (flags & (REG_ADVANCED | REG_EXPANDED | REG_NEWLINE)))
+ if ((flags®_QUOTE) &&
+ (flags&(REG_ADVANCED|REG_EXPANDED|REG_NEWLINE)))
return REG_INVARG;
- if (!(flags & REG_EXTENDED) && (flags & REG_ADVF))
+ if (!(flags®_EXTENDED) && (flags®_ADVF))
return REG_INVARG;
/* initial setup (after which freev() is callable) */
v->re = re;
- v->now = (chr *) string;
+ v->now = (chr *)string;
v->stop = v->now + len;
v->savenow = v->savestop = NULL;
v->err = 0;
v->lacons = NULL;
v->nlacons = 0;
re->re_magic = REMAGIC;
- re->re_info = 0; /* bits get set during parse */
+ re->re_info = 0; /* bits get set during parse */
re->re_csize = sizeof(chr);
re->re_guts = NULL;
re->re_fns = VS(&functions);
re->re_guts = VS(MALLOC(sizeof(struct guts)));
if (re->re_guts == NULL)
return freev(v, REG_ESPACE);
- g = (struct guts *) re->re_guts;
+ g = (struct guts *)re->re_guts;
g->tree = NULL;
initcm(v, &g->cmap);
v->cm = &g->cmap;
g->lacons = NULL;
g->nlacons = 0;
ZAPCNFA(g->search);
- v->nfa = newnfa(v, v->cm, (struct nfa *) NULL);
+ v->nfa = newnfa(v, v->cm, (struct nfa *)NULL);
CNOERR();
v->cv = newcvec(100, 20, 10);
if (v->cv == NULL)
return freev(v, REG_ESPACE);
i = nmcces(v);
- if (i > 0)
- {
+ if (i > 0) {
v->mcces = newcvec(nleaders(v), 0, i);
CNOERR();
v->mcces = allmcces(v, v->mcces);
leaders(v, v->mcces);
- addmcce(v->mcces, (chr *) NULL, (chr *) NULL); /* dummy */
+ addmcce(v->mcces, (chr *)NULL, (chr *)NULL); /* dummy */
}
CNOERR();
/* parsing */
- lexstart(v); /* also handles prefixes */
- if ((v->cflags & REG_NLSTOP) || (v->cflags & REG_NLANCH))
- {
+ lexstart(v); /* also handles prefixes */
+ if ((v->cflags®_NLSTOP) || (v->cflags®_NLANCH)) {
/* assign newline a unique color */
v->nlcolor = subcolor(v->cm, newline());
okcolors(v->nfa, v->cm);
}
CNOERR();
v->tree = parse(v, EOS, PLAIN, v->nfa->init, v->nfa->final);
- assert(SEE(EOS)); /* even if error; ISERR() => SEE(EOS) */
+ assert(SEE(EOS)); /* even if error; ISERR() => SEE(EOS) */
CNOERR();
assert(v->tree != NULL);
/* finish setup of nfa and its subre tree */
specialcolors(v->nfa);
CNOERR();
-#ifdef REG_DEBUG
- if (debug != NULL)
- {
+ if (debug != NULL) {
fprintf(debug, "\n\n\n========= RAW ==========\n");
dumpnfa(v->nfa, debug);
dumpst(v->tree, debug, 1);
- }
-#endif
+ }
optst(v, v->tree);
v->ntree = numst(v->tree, 1);
markst(v->tree);
cleanst(v);
-#ifdef REG_DEBUG
- if (debug != NULL)
- {
+ if (debug != NULL) {
fprintf(debug, "\n\n\n========= TREE FIXED ==========\n");
dumpst(v->tree, debug, 1);
}
-#endif
/* build compacted NFAs for tree and lacons */
re->re_info |= nfatree(v, v->tree, debug);
CNOERR();
assert(v->nlacons == 0 || v->lacons != NULL);
- for (i = 1; i < v->nlacons; i++)
- {
-#ifdef REG_DEBUG
+ for (i = 1; i < v->nlacons; i++) {
if (debug != NULL)
fprintf(debug, "\n\n\n========= LA%d ==========\n", i);
-#endif
nfanode(v, &v->lacons[i], debug);
}
CNOERR();
- if (v->tree->flags & SHORTER)
+ if (v->tree->flags&SHORTER)
NOTE(REG_USHORTEST);
/* build compacted NFAs for tree, lacons, fast search */
-#ifdef REG_DEBUG
if (debug != NULL)
fprintf(debug, "\n\n\n========= SEARCH ==========\n");
-#endif
/* can sacrifice main NFA now, so use it as work area */
- (DISCARD) optimize(v->nfa, debug);
+ (DISCARD)optimize(v->nfa, debug);
CNOERR();
makesearch(v, v->nfa);
CNOERR();
/* looks okay, package it up */
re->re_nsub = v->nsubexp;
- v->re = NULL; /* freev no longer frees re */
+ v->re = NULL; /* freev no longer frees re */
g->magic = GUTSMAGIC;
g->cflags = v->cflags;
g->info = re->re_info;
g->tree = v->tree;
v->tree = NULL;
g->ntree = v->ntree;
- g->compare = (v->cflags & REG_ICASE) ? casecmp : cmp;
+ g->compare = (v->cflags®_ICASE) ? casecmp : cmp;
g->lacons = v->lacons;
v->lacons = NULL;
g->nlacons = v->nlacons;
-#ifdef REG_DEBUG
- if (flags & REG_DUMP)
+ if (flags®_DUMP)
dump(re, stdout);
-#endif
assert(v->err == 0);
return freev(v, 0);
}
/*
- * moresubs - enlarge subRE vector
+ - moresubs - enlarge subRE vector
+ ^ static VOID moresubs(struct vars *, int);
*/
-static void
-moresubs(struct vars * v,
- int wanted) /* want enough room for this one */
+static VOID
+moresubs(v, wanted)
+struct vars *v;
+int wanted; /* want enough room for this one */
{
struct subre **p;
- size_t n;
-
- assert(wanted > 0 && (size_t) wanted >= v->nsubs);
- n = (size_t) wanted *3 / 2 + 1;
+ size_t n;
- if (v->subs == v->sub10)
- {
- p = (struct subre **) MALLOC(n * sizeof(struct subre *));
+ assert(wanted > 0 && (size_t)wanted >= v->nsubs);
+ n = (size_t)wanted * 3 / 2 + 1;
+ if (v->subs == v->sub10) {
+ p = (struct subre **)MALLOC(n * sizeof(struct subre *));
if (p != NULL)
memcpy(VS(p), VS(v->subs),
- v->nsubs * sizeof(struct subre *));
- }
- else
- p = (struct subre **) REALLOC(v->subs, n * sizeof(struct subre *));
- if (p == NULL)
- {
+ v->nsubs * sizeof(struct subre *));
+ } else
+ p = (struct subre **)REALLOC(v->subs, n*sizeof(struct subre *));
+ if (p == NULL) {
ERR(REG_ESPACE);
return;
}
for (p = &v->subs[v->nsubs]; v->nsubs < n; p++, v->nsubs++)
*p = NULL;
assert(v->nsubs == n);
- assert((size_t) wanted < v->nsubs);
+ assert((size_t)wanted < v->nsubs);
}
/*
- * freev - free vars struct's substructures where necessary
- *
+ - freev - free vars struct's substructures where necessary
* Optionally does error-number setting, and always returns error code
* (if any), to make error-handling code terser.
+ ^ static int freev(struct vars *, int);
*/
static int
-freev(struct vars * v,
- int err)
+freev(v, err)
+struct vars *v;
+int err;
{
if (v->re != NULL)
rfree(v->re);
freecvec(v->mcces);
if (v->lacons != NULL)
freelacons(v->lacons, v->nlacons);
- ERR(err); /* nop if err==0 */
+ ERR(err); /* nop if err==0 */
return v->err;
}
/*
- * makesearch - turn an NFA into a search NFA (implicit prepend of .*?)
+ - makesearch - turn an NFA into a search NFA (implicit prepend of .*?)
* NFA must have been optimize()d already.
+ ^ static VOID makesearch(struct vars *, struct nfa *);
*/
-static void
-makesearch(struct vars * v,
- struct nfa * nfa)
+static VOID
+makesearch(v, nfa)
+struct vars *v;
+struct nfa *nfa;
{
struct arc *a;
struct arc *b;
struct state *slist;
/* no loops are needed if it's anchored */
- for (a = pre->outs; a != NULL; a = a->outchain)
- {
+ for (a = pre->outs; a != NULL; a = a->outchain) {
assert(a->type == PLAIN);
if (a->co != nfa->bos[0] && a->co != nfa->bos[1])
break;
}
- if (a != NULL)
- {
+ if (a != NULL) {
/* add implicit .* in front */
rainbow(nfa, v->cm, PLAIN, COLORLESS, pre, pre);
/*
* Now here's the subtle part. Because many REs have no lookback
- * constraints, often knowing when you were in the pre state tells you
- * little; it's the next state(s) that are informative. But some of
- * them may have other inarcs, i.e. it may be possible to make actual
- * progress and then return to one of them. We must de-optimize such
- * cases, splitting each such state into progress and no-progress
- * states.
- */
+ * constraints, often knowing when you were in the pre state tells
+ * you little; it's the next state(s) that are informative. But
+ * some of them may have other inarcs, i.e. it may be possible to
+ * make actual progress and then return to one of them. We must
+ * de-optimize such cases, splitting each such state into progress
+ * and no-progress states.
+ */
/* first, make a list of the states */
slist = NULL;
- for (a = pre->outs; a != NULL; a = a->outchain)
- {
+ for (a = pre->outs; a != NULL; a = a->outchain) {
s = a->to;
for (b = s->ins; b != NULL; b = b->inchain)
if (b->from != pre)
- break;
- if (b != NULL)
- { /* must be split */
- s->tmp = slist;
- slist = s;
- }
+ break;
+ if (b != NULL) { /* must be split */
+ if (s->tmp == NULL) { /* if not already in the list */
+ /* (fixes bugs 505048, 230589, */
+ /* 840258, 504785) */
+ s->tmp = slist;
+ slist = s;
+ }
}
+ }
/* do the splits */
- for (s = slist; s != NULL; s = s2)
- {
+ for (s = slist; s != NULL; s = s2) {
s2 = newstate(nfa);
copyouts(nfa, s, s2);
- for (a = s->ins; a != NULL; a = b)
- {
+ for (a = s->ins; a != NULL; a = b) {
b = a->inchain;
- if (a->from != pre)
- {
+ if (a->from != pre) {
cparc(nfa, a, a->from, s2);
freearc(nfa, a);
}
}
s2 = s->tmp;
- s->tmp = NULL; /* clean up while we're at it */
+ s->tmp = NULL; /* clean up while we're at it */
}
}
/*
- * parse - parse an RE
- *
+ - parse - parse an RE
* This is actually just the top level, which parses a bunch of branches
- * tied together with '|'. They appear in the tree as the left children
+ * tied together with '|'. They appear in the tree as the left children
* of a chain of '|' subres.
+ ^ static struct subre *parse(struct vars *, int, int, struct state *,
+ ^ struct state *);
*/
static struct subre *
-parse(struct vars * v,
- int stopper, /* EOS or ')' */
- int type, /* LACON (lookahead subRE) or PLAIN */
- struct state * init, /* initial state */
- struct state * final) /* final state */
+parse(v, stopper, type, init, final)
+struct vars *v;
+int stopper; /* EOS or ')' */
+int type; /* LACON (lookahead subRE) or PLAIN */
+struct state *init; /* initial state */
+struct state *final; /* final state */
{
- struct state *left; /* scaffolding for branch */
+ struct state *left; /* scaffolding for branch */
struct state *right;
- struct subre *branches; /* top level */
- struct subre *branch; /* current branch */
- struct subre *t; /* temporary */
- int firstbranch; /* is this the first branch? */
+ struct subre *branches; /* top level */
+ struct subre *branch; /* current branch */
+ struct subre *t; /* temporary */
+ int firstbranch; /* is this the first branch? */
assert(stopper == ')' || stopper == EOS);
NOERRN();
branch = branches;
firstbranch = 1;
- do
- { /* a branch */
- if (!firstbranch)
- {
+ do { /* a branch */
+ if (!firstbranch) {
/* need a place to hang it */
branch->right = subre(v, '|', LONGER, init, final);
NOERRN();
branch->left = parsebranch(v, stopper, type, left, right, 0);
NOERRN();
branch->flags |= UP(branch->flags | branch->left->flags);
- if ((branch->flags & ~branches->flags) != 0) /* new flags */
+ if ((branch->flags &~ branches->flags) != 0) /* new flags */
for (t = branches; t != branch; t = t->right)
t->flags |= branch->flags;
} while (EAT('|'));
assert(SEE(stopper) || SEE(EOS));
- if (!SEE(stopper))
- {
+ if (!SEE(stopper)) {
assert(stopper == ')' && SEE(EOS));
ERR(REG_EPAREN);
}
/* optimize out simple cases */
- if (branch == branches)
- { /* only one branch */
+ if (branch == branches) { /* only one branch */
assert(branch->right == NULL);
t = branch->left;
branch->left = NULL;
freesubre(v, branches);
branches = t;
- }
- else if (!MESSY(branches->flags))
- { /* no interesting innards */
+ } else if (!MESSY(branches->flags)) { /* no interesting innards */
freesubre(v, branches->left);
branches->left = NULL;
freesubre(v, branches->right);
}
/*
- * parsebranch - parse one branch of an RE
- *
+ - parsebranch - parse one branch of an RE
* This mostly manages concatenation, working closely with parseqatom().
* Concatenated things are bundled up as much as possible, with separate
* ',' nodes introduced only when necessary due to substructure.
+ ^ static struct subre *parsebranch(struct vars *, int, int, struct state *,
+ ^ struct state *, int);
*/
static struct subre *
-parsebranch(struct vars * v,
- int stopper, /* EOS or ')' */
- int type, /* LACON (lookahead subRE) or PLAIN */
- struct state * left, /* leftmost state */
- struct state * right, /* rightmost state */
- int partial) /* is this only part of a branch? */
+parsebranch(v, stopper, type, left, right, partial)
+struct vars *v;
+int stopper; /* EOS or ')' */
+int type; /* LACON (lookahead subRE) or PLAIN */
+struct state *left; /* leftmost state */
+struct state *right; /* rightmost state */
+int partial; /* is this only part of a branch? */
{
- struct state *lp; /* left end of current construct */
- int seencontent; /* is there anything in this branch yet? */
+ struct state *lp; /* left end of current construct */
+ int seencontent; /* is there anything in this branch yet? */
struct subre *t;
lp = left;
seencontent = 0;
t = subre(v, '=', 0, left, right); /* op '=' is tentative */
NOERRN();
- while (!SEE('|') && !SEE(stopper) && !SEE(EOS))
- {
- if (seencontent)
- { /* implicit concat operator */
+ while (!SEE('|') && !SEE(stopper) && !SEE(EOS)) {
+ if (seencontent) { /* implicit concat operator */
lp = newstate(v->nfa);
NOERRN();
moveins(v->nfa, right, lp);
- }
+ }
seencontent = 1;
/* NB, recursion in parseqatom() may swallow rest of branch */
parseqatom(v, stopper, type, lp, right, t);
}
- if (!seencontent)
- { /* empty branch */
+ if (!seencontent) { /* empty branch */
if (!partial)
NOTE(REG_UUNSPEC);
assert(lp == left);
}
/*
- * parseqatom - parse one quantified atom or constraint of an RE
- *
+ - parseqatom - parse one quantified atom or constraint of an RE
* The bookkeeping near the end cooperates very closely with parsebranch();
* in particular, it contains a recursion that can involve parsing the rest
* of the branch, making this function's name somewhat inaccurate.
+ ^ static VOID parseqatom(struct vars *, int, int, struct state *,
+ ^ struct state *, struct subre *);
*/
-static void
-parseqatom(struct vars * v,
- int stopper, /* EOS or ')' */
- int type, /* LACON (lookahead subRE) or PLAIN */
- struct state * lp, /* left state to hang it on */
- struct state * rp, /* right state to hang it on */
- struct subre * top) /* subtree top */
+static VOID
+parseqatom(v, stopper, type, lp, rp, top)
+struct vars *v;
+int stopper; /* EOS or ')' */
+int type; /* LACON (lookahead subRE) or PLAIN */
+struct state *lp; /* left state to hang it on */
+struct state *rp; /* right state to hang it on */
+struct subre *top; /* subtree top */
{
- struct state *s; /* temporaries for new states */
+ struct state *s; /* temporaries for new states */
struct state *s2;
-
-#define ARCV(t, val) newarc(v->nfa, t, val, lp, rp)
- int m,
- n;
- struct subre *atom; /* atom's subtree */
+# define ARCV(t, val) newarc(v->nfa, t, val, lp, rp)
+ int m, n;
+ struct subre *atom; /* atom's subtree */
struct subre *t;
- int cap; /* capturing parens? */
- int pos; /* positive lookahead? */
- int subno; /* capturing-parens or backref number */
- int atomtype;
- int qprefer; /* quantifier short/long preference */
- int f;
- struct subre **atomp; /* where the pointer to atom is */
+ int cap; /* capturing parens? */
+ int pos; /* positive lookahead? */
+ int subno; /* capturing-parens or backref number */
+ int atomtype;
+ int qprefer; /* quantifier short/long preference */
+ int f;
+ struct subre **atomp; /* where the pointer to atom is */
/* initial bookkeeping */
atom = NULL;
- assert(lp->nouts == 0); /* must string new code */
- assert(rp->nins == 0); /* between lp and rp */
- subno = 0; /* just to shut lint up */
+ assert(lp->nouts == 0); /* must string new code */
+ assert(rp->nins == 0); /* between lp and rp */
+ subno = 0; /* just to shut lint up */
/* an atom or constraint... */
atomtype = v->nexttype;
- switch (atomtype)
- {
- /* first, constraints, which end by returning */
- case '^':
- ARCV('^', 1);
- if (v->cflags & REG_NLANCH)
- ARCV(BEHIND, v->nlcolor);
- NEXT();
- return;
- break;
- case '$':
- ARCV('$', 1);
- if (v->cflags & REG_NLANCH)
- ARCV(AHEAD, v->nlcolor);
- NEXT();
- return;
- break;
- case SBEGIN:
- ARCV('^', 1); /* BOL */
- ARCV('^', 0); /* or BOS */
- NEXT();
- return;
- break;
- case SEND:
- ARCV('$', 1); /* EOL */
- ARCV('$', 0); /* or EOS */
- NEXT();
- return;
- break;
- case '<':
- wordchrs(v); /* does NEXT() */
- s = newstate(v->nfa);
- NOERR();
- nonword(v, BEHIND, lp, s);
- word(v, AHEAD, s, rp);
- return;
- break;
- case '>':
- wordchrs(v); /* does NEXT() */
- s = newstate(v->nfa);
- NOERR();
- word(v, BEHIND, lp, s);
- nonword(v, AHEAD, s, rp);
- return;
+ switch (atomtype) {
+ /* first, constraints, which end by returning */
+ case '^':
+ ARCV('^', 1);
+ if (v->cflags®_NLANCH)
+ ARCV(BEHIND, v->nlcolor);
+ NEXT();
+ return;
break;
- case WBDRY:
- wordchrs(v); /* does NEXT() */
- s = newstate(v->nfa);
- NOERR();
- nonword(v, BEHIND, lp, s);
- word(v, AHEAD, s, rp);
- s = newstate(v->nfa);
- NOERR();
- word(v, BEHIND, lp, s);
- nonword(v, AHEAD, s, rp);
- return;
- break;
- case NWBDRY:
- wordchrs(v); /* does NEXT() */
- s = newstate(v->nfa);
- NOERR();
- word(v, BEHIND, lp, s);
- word(v, AHEAD, s, rp);
- s = newstate(v->nfa);
- NOERR();
- nonword(v, BEHIND, lp, s);
- nonword(v, AHEAD, s, rp);
- return;
+ case '$':
+ ARCV('$', 1);
+ if (v->cflags®_NLANCH)
+ ARCV(AHEAD, v->nlcolor);
+ NEXT();
+ return;
+ break;
+ case SBEGIN:
+ ARCV('^', 1); /* BOL */
+ ARCV('^', 0); /* or BOS */
+ NEXT();
+ return;
+ break;
+ case SEND:
+ ARCV('$', 1); /* EOL */
+ ARCV('$', 0); /* or EOS */
+ NEXT();
+ return;
+ break;
+ case '<':
+ wordchrs(v); /* does NEXT() */
+ s = newstate(v->nfa);
+ NOERR();
+ nonword(v, BEHIND, lp, s);
+ word(v, AHEAD, s, rp);
+ return;
+ break;
+ case '>':
+ wordchrs(v); /* does NEXT() */
+ s = newstate(v->nfa);
+ NOERR();
+ word(v, BEHIND, lp, s);
+ nonword(v, AHEAD, s, rp);
+ return;
+ break;
+ case WBDRY:
+ wordchrs(v); /* does NEXT() */
+ s = newstate(v->nfa);
+ NOERR();
+ nonword(v, BEHIND, lp, s);
+ word(v, AHEAD, s, rp);
+ s = newstate(v->nfa);
+ NOERR();
+ word(v, BEHIND, lp, s);
+ nonword(v, AHEAD, s, rp);
+ return;
+ break;
+ case NWBDRY:
+ wordchrs(v); /* does NEXT() */
+ s = newstate(v->nfa);
+ NOERR();
+ word(v, BEHIND, lp, s);
+ word(v, AHEAD, s, rp);
+ s = newstate(v->nfa);
+ NOERR();
+ nonword(v, BEHIND, lp, s);
+ nonword(v, AHEAD, s, rp);
+ return;
+ break;
+ case LACON: /* lookahead constraint */
+ pos = v->nextvalue;
+ NEXT();
+ s = newstate(v->nfa);
+ s2 = newstate(v->nfa);
+ NOERR();
+ t = parse(v, ')', LACON, s, s2);
+ freesubre(v, t); /* internal structure irrelevant */
+ assert(SEE(')') || ISERR());
+ NEXT();
+ n = newlacon(v, s, s2, pos);
+ NOERR();
+ ARCV(LACON, n);
+ return;
+ break;
+ /* then errors, to get them out of the way */
+ case '*':
+ case '+':
+ case '?':
+ case '{':
+ ERR(REG_BADRPT);
+ return;
break;
- case LACON: /* lookahead constraint */
- pos = v->nextvalue;
- NEXT();
- s = newstate(v->nfa);
- s2 = newstate(v->nfa);
- NOERR();
- t = parse(v, ')', LACON, s, s2);
- freesubre(v, t); /* internal structure irrelevant */
- assert(SEE(')') || ISERR());
- NEXT();
- n = newlacon(v, s, s2, pos);
- NOERR();
- ARCV(LACON, n);
- return;
- break;
- /* then errors, to get them out of the way */
- case '*':
- case '+':
- case '?':
- case '{':
- ERR(REG_BADRPT);
- return;
- break;
default:
- ERR(REG_ASSERT);
+ ERR(REG_ASSERT);
+ return;
+ break;
+ /* then plain characters, and minor variants on that theme */
+ case ')': /* unbalanced paren */
+ if ((v->cflags®_ADVANCED) != REG_EXTENDED) {
+ ERR(REG_EPAREN);
return;
+ }
+ /* legal in EREs due to specification botch */
+ NOTE(REG_UPBOTCH);
+ /* fallthrough into case PLAIN */
+ case PLAIN:
+ onechr(v, v->nextvalue, lp, rp);
+ okcolors(v->nfa, v->cm);
+ NOERR();
+ NEXT();
break;
- /* then plain characters, and minor variants on that theme */
- case ')': /* unbalanced paren */
- if ((v->cflags & REG_ADVANCED) != REG_EXTENDED)
- {
- ERR(REG_EPAREN);
- return;
- }
- /* legal in EREs due to specification botch */
- NOTE(REG_UPBOTCH);
- /* fallthrough into case PLAIN */
- case PLAIN:
- onechr(v, v->nextvalue, lp, rp);
- okcolors(v->nfa, v->cm);
- NOERR();
- NEXT();
+ case '[':
+ if (v->nextvalue == 1)
+ bracket(v, lp, rp);
+ else
+ cbracket(v, lp, rp);
+ assert(SEE(']') || ISERR());
+ NEXT();
break;
- case '[':
- if (v->nextvalue == 1)
- bracket(v, lp, rp);
- else
- cbracket(v, lp, rp);
- assert(SEE(']') || ISERR());
- NEXT();
+ case '.':
+ rainbow(v->nfa, v->cm, PLAIN,
+ (v->cflags®_NLSTOP) ? v->nlcolor : COLORLESS,
+ lp, rp);
+ NEXT();
break;
- case '.':
- rainbow(v->nfa, v->cm, PLAIN,
- (v->cflags & REG_NLSTOP) ? v->nlcolor : COLORLESS,
- lp, rp);
- NEXT();
- break;
- /* and finally the ugly stuff */
- case '(': /* value flags as capturing or non */
- cap = (type == LACON) ? 0 : v->nextvalue;
- if (cap)
- {
- v->nsubexp++;
- subno = v->nsubexp;
- if ((size_t) subno >= v->nsubs)
- moresubs(v, subno);
- assert((size_t) subno < v->nsubs);
- }
- else
- atomtype = PLAIN; /* something that's not '(' */
- NEXT();
- /* need new endpoints because tree will contain pointers */
- s = newstate(v->nfa);
- s2 = newstate(v->nfa);
- NOERR();
- EMPTYARC(lp, s);
- EMPTYARC(s2, rp);
- NOERR();
- atom = parse(v, ')', PLAIN, s, s2);
- assert(SEE(')') || ISERR());
- NEXT();
- NOERR();
- if (cap)
- {
- v->subs[subno] = atom;
- t = subre(v, '(', atom->flags | CAP, lp, rp);
- NOERR();
- t->subno = subno;
- t->left = atom;
- atom = t;
- }
- /* postpone everything else pending possible {0} */
- break;
- case BACKREF: /* the Feature From The Black Lagoon */
- INSIST(type != LACON, REG_ESUBREG);
- INSIST(v->nextvalue < v->nsubs, REG_ESUBREG);
- INSIST(v->subs[v->nextvalue] != NULL, REG_ESUBREG);
+ /* and finally the ugly stuff */
+ case '(': /* value flags as capturing or non */
+ cap = (type == LACON) ? 0 : v->nextvalue;
+ if (cap) {
+ v->nsubexp++;
+ subno = v->nsubexp;
+ if ((size_t)subno >= v->nsubs)
+ moresubs(v, subno);
+ assert((size_t)subno < v->nsubs);
+ } else
+ atomtype = PLAIN; /* something that's not '(' */
+ NEXT();
+ /* need new endpoints because tree will contain pointers */
+ s = newstate(v->nfa);
+ s2 = newstate(v->nfa);
+ NOERR();
+ EMPTYARC(lp, s);
+ EMPTYARC(s2, rp);
+ NOERR();
+ atom = parse(v, ')', PLAIN, s, s2);
+ assert(SEE(')') || ISERR());
+ NEXT();
+ NOERR();
+ if (cap) {
+ v->subs[subno] = atom;
+ t = subre(v, '(', atom->flags|CAP, lp, rp);
NOERR();
- assert(v->nextvalue > 0);
- atom = subre(v, 'b', BACKR, lp, rp);
- subno = v->nextvalue;
- atom->subno = subno;
- EMPTYARC(lp, rp); /* temporarily, so there's something */
- NEXT();
+ t->subno = subno;
+ t->left = atom;
+ atom = t;
+ }
+ /* postpone everything else pending possible {0} */
+ break;
+ case BACKREF: /* the Feature From The Black Lagoon */
+ INSIST(type != LACON, REG_ESUBREG);
+ INSIST(v->nextvalue < v->nsubs, REG_ESUBREG);
+ INSIST(v->subs[v->nextvalue] != NULL, REG_ESUBREG);
+ NOERR();
+ assert(v->nextvalue > 0);
+ atom = subre(v, 'b', BACKR, lp, rp);
+ subno = v->nextvalue;
+ atom->subno = subno;
+ EMPTYARC(lp, rp); /* temporarily, so there's something */
+ NEXT();
break;
}
/* ...and an atom may be followed by a quantifier */
- switch (v->nexttype)
- {
- case '*':
- m = 0;
- n = INFINITY;
- qprefer = (v->nextvalue) ? LONGER : SHORTER;
- NEXT();
- break;
- case '+':
- m = 1;
- n = INFINITY;
- qprefer = (v->nextvalue) ? LONGER : SHORTER;
- NEXT();
- break;
- case '?':
- m = 0;
- n = 1;
- qprefer = (v->nextvalue) ? LONGER : SHORTER;
+ switch (v->nexttype) {
+ case '*':
+ m = 0;
+ n = INFINITY;
+ qprefer = (v->nextvalue) ? LONGER : SHORTER;
NEXT();
- break;
- case '{':
- NEXT();
- m = scannum(v);
- if (EAT(','))
- {
- if (SEE(DIGIT))
- n = scannum(v);
- else
- n = INFINITY;
- if (m > n)
- {
- ERR(REG_BADBR);
- return;
- }
- /* {m,n} exercises preference, even if it's {m,m} */
- qprefer = (v->nextvalue) ? LONGER : SHORTER;
- }
+ break;
+ case '+':
+ m = 1;
+ n = INFINITY;
+ qprefer = (v->nextvalue) ? LONGER : SHORTER;
+ NEXT();
+ break;
+ case '?':
+ m = 0;
+ n = 1;
+ qprefer = (v->nextvalue) ? LONGER : SHORTER;
+ NEXT();
+ break;
+ case '{':
+ NEXT();
+ m = scannum(v);
+ if (EAT(',')) {
+ if (SEE(DIGIT))
+ n = scannum(v);
else
- {
- n = m;
- /* {m} passes operand's preference through */
- qprefer = 0;
- }
- if (!SEE('}'))
- { /* catches errors too */
+ n = INFINITY;
+ if (m > n) {
ERR(REG_BADBR);
return;
}
- NEXT();
- break;
- default: /* no quantifier */
- m = n = 1;
+ /* {m,n} exercises preference, even if it's {m,m} */
+ qprefer = (v->nextvalue) ? LONGER : SHORTER;
+ } else {
+ n = m;
+ /* {m} passes operand's preference through */
qprefer = 0;
- break;
+ }
+ if (!SEE('}')) { /* catches errors too */
+ ERR(REG_BADBR);
+ return;
+ }
+ NEXT();
+ break;
+ default: /* no quantifier */
+ m = n = 1;
+ qprefer = 0;
+ break;
}
/* annoying special case: {0} or {0,0} cancels everything */
- if (m == 0 && n == 0)
- {
+ if (m == 0 && n == 0) {
if (atom != NULL)
freesubre(v, atom);
if (atomtype == '(')
/* if not a messy case, avoid hard part */
assert(!MESSY(top->flags));
f = top->flags | qprefer | ((atom != NULL) ? atom->flags : 0);
- if (atomtype != '(' && atomtype != BACKREF && !MESSY(UP(f)))
- {
+ if (atomtype != '(' && atomtype != BACKREF && !MESSY(UP(f))) {
if (!(m == 1 && n == 1))
repeat(v, lp, rp, m, n);
if (atom != NULL)
}
/*
- * hard part: something messy That is, capturing parens, back
- * reference, short/long clash, or an atom with substructure
- * containing one of those.
- */
+ * hard part: something messy
+ * That is, capturing parens, back reference, short/long clash, or
+ * an atom with substructure containing one of those.
+ */
/* now we'll need a subre for the contents even if they're boring */
- if (atom == NULL)
- {
+ if (atom == NULL) {
atom = subre(v, '=', 0, lp, rp);
NOERR();
}
/*
* prepare a general-purpose state skeleton
*
- * ---> [s] ---prefix---> [begin] ---atom---> [end] ----rest---> [rp] / /
+ * ---> [s] ---prefix---> [begin] ---atom---> [end] ----rest---> [rp]
+ * / /
* [lp] ----> [s2] ----bypass---------------------
*
* where bypass is an empty, and prefix is some repetitions of atom
- */
+ */
s = newstate(v->nfa); /* first, new endpoints for the atom */
s2 = newstate(v->nfa);
NOERR();
top->right = t;
/* if it's a backref, now is the time to replicate the subNFA */
- if (atomtype == BACKREF)
- {
- assert(atom->begin->nouts == 1); /* just the EMPTY */
+ if (atomtype == BACKREF) {
+ assert(atom->begin->nouts == 1); /* just the EMPTY */
delsub(v->nfa, atom->begin, atom->end);
assert(v->subs[subno] != NULL);
/* and here's why the recursion got postponed: it must */
/* wait until the skeleton is filled in, because it may */
/* hit a backref that wants to copy the filled-in skeleton */
dupnfa(v->nfa, v->subs[subno]->begin, v->subs[subno]->end,
- atom->begin, atom->end);
+ atom->begin, atom->end);
NOERR();
}
/* it's quantifier time; first, turn x{0,...} into x{1,...}|empty */
- if (m == 0)
- {
- EMPTYARC(s2, atom->end); /* the bypass */
+ if (m == 0) {
+ EMPTYARC(s2, atom->end); /* the bypass */
assert(PREF(qprefer) != 0);
f = COMBINE(qprefer, atom->flags);
t = subre(v, '|', f, lp, atom->end);
}
/* deal with the rest of the quantifier */
- if (atomtype == BACKREF)
- {
+ if (atomtype == BACKREF) {
/* special case: backrefs have internal quantifiers */
- EMPTYARC(s, atom->begin); /* empty prefix */
+ EMPTYARC(s, atom->begin); /* empty prefix */
/* just stuff everything into atom */
repeat(v, atom->begin, atom->end, m, n);
- atom->min = (short) m;
- atom->max = (short) n;
+ atom->min = (short)m;
+ atom->max = (short)n;
atom->flags |= COMBINE(qprefer, atom->flags);
- }
- else if (m == 1 && n == 1)
- {
+ } else if (m == 1 && n == 1) {
/* no/vacuous quantifier: done */
- EMPTYARC(s, atom->begin); /* empty prefix */
- }
- else
- {
+ EMPTYARC(s, atom->begin); /* empty prefix */
+ } else {
/* turn x{m,n} into x{m-1,n-1}x, with capturing */
- /* parens in only second x */
+ /* parens in only second x */
dupnfa(v->nfa, atom->begin, atom->end, s, atom->begin);
assert(m >= 1 && m != INFINITY && n >= 1);
- repeat(v, s, atom->begin, m - 1, (n == INFINITY) ? n : n - 1);
+ repeat(v, s, atom->begin, m-1, (n == INFINITY) ? n : n-1);
f = COMBINE(qprefer, atom->flags);
- t = subre(v, '.', f, s, atom->end); /* prefix and atom */
+ t = subre(v, '.', f, s, atom->end); /* prefix and atom */
NOERR();
t->left = subre(v, '=', PREF(f), s, atom->begin);
NOERR();
t = top->right;
if (!(SEE('|') || SEE(stopper) || SEE(EOS)))
t->right = parsebranch(v, stopper, type, atom->end, rp, 1);
- else
- {
+ else {
EMPTYARC(atom->end, rp);
t->right = subre(v, '=', 0, atom->end, rp);
}
}
/*
- * nonword - generate arcs for non-word-character ahead or behind
+ - nonword - generate arcs for non-word-character ahead or behind
+ ^ static VOID nonword(struct vars *, int, struct state *, struct state *);
*/
-static void
-nonword(struct vars * v,
- int dir, /* AHEAD or BEHIND */
- struct state * lp,
- struct state * rp)
+static VOID
+nonword(v, dir, lp, rp)
+struct vars *v;
+int dir; /* AHEAD or BEHIND */
+struct state *lp;
+struct state *rp;
{
- int anchor = (dir == AHEAD) ? '$' : '^';
+ int anchor = (dir == AHEAD) ? '$' : '^';
assert(dir == AHEAD || dir == BEHIND);
newarc(v->nfa, anchor, 1, lp, rp);
}
/*
- * word - generate arcs for word character ahead or behind
+ - word - generate arcs for word character ahead or behind
+ ^ static VOID word(struct vars *, int, struct state *, struct state *);
*/
-static void
-word(struct vars * v,
- int dir, /* AHEAD or BEHIND */
- struct state * lp,
- struct state * rp)
+static VOID
+word(v, dir, lp, rp)
+struct vars *v;
+int dir; /* AHEAD or BEHIND */
+struct state *lp;
+struct state *rp;
{
assert(dir == AHEAD || dir == BEHIND);
cloneouts(v->nfa, v->wordchrs, lp, rp, dir);
}
/*
- * scannum - scan a number
+ - scannum - scan a number
+ ^ static int scannum(struct vars *);
*/
-static int /* value, <= DUPMAX */
-scannum(struct vars * v)
+static int /* value, <= DUPMAX */
+scannum(v)
+struct vars *v;
{
- int n = 0;
+ int n = 0;
- while (SEE(DIGIT) && n < DUPMAX)
- {
- n = n * 10 + v->nextvalue;
+ while (SEE(DIGIT) && n < DUPMAX) {
+ n = n*10 + v->nextvalue;
NEXT();
}
- if (SEE(DIGIT) || n > DUPMAX)
- {
+ if (SEE(DIGIT) || n > DUPMAX) {
ERR(REG_BADBR);
return 0;
}
}
/*
- * repeat - replicate subNFA for quantifiers
- *
+ - repeat - replicate subNFA for quantifiers
* The duplication sequences used here are chosen carefully so that any
* pointers starting out pointing into the subexpression end up pointing into
* the last occurrence. (Note that it may not be strung between the same
* left and right end states, however!) This used to be important for the
* subRE tree, although the important bits are now handled by the in-line
* code in parse(), and when this is called, it doesn't matter any more.
+ ^ static VOID repeat(struct vars *, struct state *, struct state *, int, int);
*/
-static void
-repeat(struct vars * v,
- struct state * lp,
- struct state * rp,
- int m,
- int n)
+static VOID
+repeat(v, lp, rp, m, n)
+struct vars *v;
+struct state *lp;
+struct state *rp;
+int m;
+int n;
{
-#define SOME 2
-#define INF 3
-#define PAIR(x, y) ((x)*4 + (y))
-#define REDUCE(x) ( ((x) == INFINITY) ? INF : (((x) > 1) ? SOME : (x)) )
- const int rm = REDUCE(m);
- const int rn = REDUCE(n);
+# define SOME 2
+# define INF 3
+# define PAIR(x, y) ((x)*4 + (y))
+# define REDUCE(x) ( ((x) == INFINITY) ? INF : (((x) > 1) ? SOME : (x)) )
+ CONST int rm = REDUCE(m);
+ CONST int rn = REDUCE(n);
struct state *s;
struct state *s2;
- switch (PAIR(rm, rn))
- {
- case PAIR(0, 0): /* empty string */
- delsub(v->nfa, lp, rp);
- EMPTYARC(lp, rp);
- break;
- case PAIR(0, 1): /* do as x| */
- EMPTYARC(lp, rp);
- break;
- case PAIR(0, SOME): /* do as x{1,n}| */
- repeat(v, lp, rp, 1, n);
- NOERR();
- EMPTYARC(lp, rp);
- break;
- case PAIR(0, INF): /* loop x around */
- s = newstate(v->nfa);
- NOERR();
- moveouts(v->nfa, lp, s);
- moveins(v->nfa, rp, s);
- EMPTYARC(lp, s);
- EMPTYARC(s, rp);
- break;
- case PAIR(1, 1): /* no action required */
- break;
- case PAIR(1, SOME): /* do as x{0,n-1}x = (x{1,n-1}|)x */
- s = newstate(v->nfa);
- NOERR();
- moveouts(v->nfa, lp, s);
- dupnfa(v->nfa, s, rp, lp, s);
- NOERR();
- repeat(v, lp, s, 1, n - 1);
- NOERR();
- EMPTYARC(lp, s);
- break;
- case PAIR(1, INF): /* add loopback arc */
- s = newstate(v->nfa);
- s2 = newstate(v->nfa);
- NOERR();
- moveouts(v->nfa, lp, s);
- moveins(v->nfa, rp, s2);
- EMPTYARC(lp, s);
- EMPTYARC(s2, rp);
- EMPTYARC(s2, s);
- break;
- case PAIR(SOME, SOME): /* do as x{m-1,n-1}x */
- s = newstate(v->nfa);
- NOERR();
- moveouts(v->nfa, lp, s);
- dupnfa(v->nfa, s, rp, lp, s);
- NOERR();
- repeat(v, lp, s, m - 1, n - 1);
- break;
- case PAIR(SOME, INF): /* do as x{m-1,}x */
- s = newstate(v->nfa);
- NOERR();
- moveouts(v->nfa, lp, s);
- dupnfa(v->nfa, s, rp, lp, s);
- NOERR();
- repeat(v, lp, s, m - 1, n);
- break;
- default:
- ERR(REG_ASSERT);
- break;
+ switch (PAIR(rm, rn)) {
+ case PAIR(0, 0): /* empty string */
+ delsub(v->nfa, lp, rp);
+ EMPTYARC(lp, rp);
+ break;
+ case PAIR(0, 1): /* do as x| */
+ EMPTYARC(lp, rp);
+ break;
+ case PAIR(0, SOME): /* do as x{1,n}| */
+ repeat(v, lp, rp, 1, n);
+ NOERR();
+ EMPTYARC(lp, rp);
+ break;
+ case PAIR(0, INF): /* loop x around */
+ s = newstate(v->nfa);
+ NOERR();
+ moveouts(v->nfa, lp, s);
+ moveins(v->nfa, rp, s);
+ EMPTYARC(lp, s);
+ EMPTYARC(s, rp);
+ break;
+ case PAIR(1, 1): /* no action required */
+ break;
+ case PAIR(1, SOME): /* do as x{0,n-1}x = (x{1,n-1}|)x */
+ s = newstate(v->nfa);
+ NOERR();
+ moveouts(v->nfa, lp, s);
+ dupnfa(v->nfa, s, rp, lp, s);
+ NOERR();
+ repeat(v, lp, s, 1, n-1);
+ NOERR();
+ EMPTYARC(lp, s);
+ break;
+ case PAIR(1, INF): /* add loopback arc */
+ s = newstate(v->nfa);
+ s2 = newstate(v->nfa);
+ NOERR();
+ moveouts(v->nfa, lp, s);
+ moveins(v->nfa, rp, s2);
+ EMPTYARC(lp, s);
+ EMPTYARC(s2, rp);
+ EMPTYARC(s2, s);
+ break;
+ case PAIR(SOME, SOME): /* do as x{m-1,n-1}x */
+ s = newstate(v->nfa);
+ NOERR();
+ moveouts(v->nfa, lp, s);
+ dupnfa(v->nfa, s, rp, lp, s);
+ NOERR();
+ repeat(v, lp, s, m-1, n-1);
+ break;
+ case PAIR(SOME, INF): /* do as x{m-1,}x */
+ s = newstate(v->nfa);
+ NOERR();
+ moveouts(v->nfa, lp, s);
+ dupnfa(v->nfa, s, rp, lp, s);
+ NOERR();
+ repeat(v, lp, s, m-1, n);
+ break;
+ default:
+ ERR(REG_ASSERT);
+ break;
}
}
/*
- * bracket - handle non-complemented bracket expression
+ - bracket - handle non-complemented bracket expression
* Also called from cbracket for complemented bracket expressions.
+ ^ static VOID bracket(struct vars *, struct state *, struct state *);
*/
-static void
-bracket(struct vars * v,
- struct state * lp,
- struct state * rp)
+static VOID
+bracket(v, lp, rp)
+struct vars *v;
+struct state *lp;
+struct state *rp;
{
assert(SEE('['));
NEXT();
}
/*
- * cbracket - handle complemented bracket expression
+ - cbracket - handle complemented bracket expression
* We do it by calling bracket() with dummy endpoints, and then complementing
- * the result. The alternative would be to invoke rainbow(), and then delete
+ * the result. The alternative would be to invoke rainbow(), and then delete
* arcs as the b.e. is seen... but that gets messy.
+ ^ static VOID cbracket(struct vars *, struct state *, struct state *);
*/
-static void
-cbracket(struct vars * v,
- struct state * lp,
- struct state * rp)
+static VOID
+cbracket(v, lp, rp)
+struct vars *v;
+struct state *lp;
+struct state *rp;
{
struct state *left = newstate(v->nfa);
struct state *right = newstate(v->nfa);
struct state *s;
- struct arc *a; /* arc from lp */
- struct arc *ba; /* arc from left, from bracket() */
- struct arc *pa; /* MCCE-prototype arc */
- color co;
- chr *p;
- int i;
+ struct arc *a; /* arc from lp */
+ struct arc *ba; /* arc from left, from bracket() */
+ struct arc *pa; /* MCCE-prototype arc */
+ color co;
+ chr *p;
+ int i;
NOERR();
bracket(v, left, right);
- if (v->cflags & REG_NLSTOP)
+ if (v->cflags®_NLSTOP)
newarc(v->nfa, PLAIN, v->nlcolor, left, right);
NOERR();
/* easy part of complementing */
colorcomplement(v->nfa, v->cm, PLAIN, left, lp, rp);
NOERR();
- if (v->mcces == NULL)
- { /* no MCCEs -- we're done */
+ if (v->mcces == NULL) { /* no MCCEs -- we're done */
dropstate(v->nfa, left);
assert(right->nins == 0);
freestate(v->nfa, right);
/* but complementing gets messy in the presence of MCCEs... */
NOTE(REG_ULOCALE);
- for (p = v->mcces->chrs, i = v->mcces->nchrs; i > 0; p++, i--)
- {
+ for (p = v->mcces->chrs, i = v->mcces->nchrs; i > 0; p++, i--) {
co = GETCOLOR(v->cm, *p);
a = findarc(lp, PLAIN, co);
ba = findarc(left, PLAIN, co);
- if (ba == NULL)
- {
+ if (ba == NULL) {
assert(a != NULL);
freearc(v->nfa, a);
- }
- else
+ } else {
assert(a == NULL);
+ }
s = newstate(v->nfa);
NOERR();
newarc(v->nfa, PLAIN, co, lp, s);
NOERR();
pa = findarc(v->mccepbegin, PLAIN, co);
assert(pa != NULL);
- if (ba == NULL)
- { /* easy case, need all of them */
+ if (ba == NULL) { /* easy case, need all of them */
cloneouts(v->nfa, pa->to, s, rp, PLAIN);
newarc(v->nfa, '$', 1, s, rp);
newarc(v->nfa, '$', 0, s, rp);
colorcomplement(v->nfa, v->cm, AHEAD, pa->to, s, rp);
- }
- else
- { /* must be selective */
- if (findarc(ba->to, '$', 1) == NULL)
- {
+ } else { /* must be selective */
+ if (findarc(ba->to, '$', 1) == NULL) {
newarc(v->nfa, '$', 1, s, rp);
newarc(v->nfa, '$', 0, s, rp);
colorcomplement(v->nfa, v->cm, AHEAD, pa->to,
- s, rp);
+ s, rp);
}
for (pa = pa->to->outs; pa != NULL; pa = pa->outchain)
if (findarc(ba->to, PLAIN, pa->co) == NULL)
assert(right->nins == 0);
freestate(v->nfa, right);
}
-
+
/*
- * brackpart - handle one item (or range) within a bracket expression
+ - brackpart - handle one item (or range) within a bracket expression
+ ^ static VOID brackpart(struct vars *, struct state *, struct state *);
*/
-static void
-brackpart(struct vars * v,
- struct state * lp,
- struct state * rp)
+static VOID
+brackpart(v, lp, rp)
+struct vars *v;
+struct state *lp;
+struct state *rp;
{
- celt startc;
- celt endc;
+ celt startc;
+ celt endc;
struct cvec *cv;
- chr *startp;
- chr *endp;
- chr c[1];
+ chr *startp;
+ chr *endp;
+ chr c[1];
/* parse something, get rid of special cases, take shortcuts */
- switch (v->nexttype)
- {
- case RANGE: /* a-b-c or other botch */
- ERR(REG_ERANGE);
+ switch (v->nexttype) {
+ case RANGE: /* a-b-c or other botch */
+ ERR(REG_ERANGE);
+ return;
+ break;
+ case PLAIN:
+ c[0] = v->nextvalue;
+ NEXT();
+ /* shortcut for ordinary chr (not range, not MCCE leader) */
+ if (!SEE(RANGE) && !ISCELEADER(v, c[0])) {
+ onechr(v, c[0], lp, rp);
return;
+ }
+ startc = element(v, c, c+1);
+ NOERR();
+ break;
+ case COLLEL:
+ startp = v->now;
+ endp = scanplain(v);
+ INSIST(startp < endp, REG_ECOLLATE);
+ NOERR();
+ startc = element(v, startp, endp);
+ NOERR();
+ break;
+ case ECLASS:
+ startp = v->now;
+ endp = scanplain(v);
+ INSIST(startp < endp, REG_ECOLLATE);
+ NOERR();
+ startc = element(v, startp, endp);
+ NOERR();
+ cv = eclass(v, startc, (v->cflags®_ICASE));
+ NOERR();
+ dovec(v, cv, lp, rp);
+ return;
break;
+ case CCLASS:
+ startp = v->now;
+ endp = scanplain(v);
+ INSIST(startp < endp, REG_ECTYPE);
+ NOERR();
+ cv = cclass(v, startp, endp, (v->cflags®_ICASE));
+ NOERR();
+ dovec(v, cv, lp, rp);
+ return;
+ break;
+ default:
+ ERR(REG_ASSERT);
+ return;
+ break;
+ }
+
+ if (SEE(RANGE)) {
+ NEXT();
+ switch (v->nexttype) {
case PLAIN:
+ case RANGE:
c[0] = v->nextvalue;
NEXT();
- /* shortcut for ordinary chr (not range, not MCCE leader) */
- if (!SEE(RANGE) && !ISCELEADER(v, c[0]))
- {
- onechr(v, c[0], lp, rp);
- return;
- }
- startc = element(v, c, c + 1);
+ endc = element(v, c, c+1);
NOERR();
- break;
+ break;
case COLLEL:
startp = v->now;
endp = scanplain(v);
INSIST(startp < endp, REG_ECOLLATE);
NOERR();
- startc = element(v, startp, endp);
+ endc = element(v, startp, endp);
NOERR();
break;
- case ECLASS:
- startp = v->now;
- endp = scanplain(v);
- INSIST(startp < endp, REG_ECOLLATE);
- NOERR();
- startc = element(v, startp, endp);
- NOERR();
- cv = eclass(v, startc, (v->cflags & REG_ICASE));
- NOERR();
- dovec(v, cv, lp, rp);
- return;
- break;
- case CCLASS:
- startp = v->now;
- endp = scanplain(v);
- INSIST(startp < endp, REG_ECTYPE);
- NOERR();
- cv = cclass(v, startp, endp, (v->cflags & REG_ICASE));
- NOERR();
- dovec(v, cv, lp, rp);
- return;
- break;
default:
- ERR(REG_ASSERT);
+ ERR(REG_ERANGE);
return;
- break;
- }
-
- if (SEE(RANGE))
- {
- NEXT();
- switch (v->nexttype)
- {
- case PLAIN:
- case RANGE:
- c[0] = v->nextvalue;
- NEXT();
- endc = element(v, c, c + 1);
- NOERR();
- break;
- case COLLEL:
- startp = v->now;
- endp = scanplain(v);
- INSIST(startp < endp, REG_ECOLLATE);
- NOERR();
- endc = element(v, startp, endp);
- NOERR();
- break;
- default:
- ERR(REG_ERANGE);
- return;
- break;
- }
- }
- else
+ break;
+ }
+ } else
endc = startc;
/*
- * Ranges are unportable. Actually, standard C does guarantee that
- * digits are contiguous, but making that an exception is just too
- * complicated.
- */
+ * Ranges are unportable. Actually, standard C does
+ * guarantee that digits are contiguous, but making
+ * that an exception is just too complicated.
+ */
if (startc != endc)
NOTE(REG_UUNPORT);
- cv = range(v, startc, endc, (v->cflags & REG_ICASE));
+ cv = range(v, startc, endc, (v->cflags®_ICASE));
NOERR();
dovec(v, cv, lp, rp);
}
/*
- * scanplain - scan PLAIN contents of [. etc.
- *
+ - scanplain - scan PLAIN contents of [. etc.
* Certain bits of trickery in lex.c know that this code does not try
* to look past the final bracket of the [. etc.
+ ^ static chr *scanplain(struct vars *);
*/
-static chr * /* just after end of sequence */
-scanplain(struct vars * v)
+static chr * /* just after end of sequence */
+scanplain(v)
+struct vars *v;
{
- chr *endp;
+ chr *endp;
assert(SEE(COLLEL) || SEE(ECLASS) || SEE(CCLASS));
NEXT();
endp = v->now;
- while (SEE(PLAIN))
- {
+ while (SEE(PLAIN)) {
endp = v->now;
NEXT();
}
}
/*
- * leaders - process a cvec of collating elements to also include leaders
+ - leaders - process a cvec of collating elements to also include leaders
* Also gives all characters involved their own colors, which is almost
* certainly necessary, and sets up little disconnected subNFA.
+ ^ static VOID leaders(struct vars *, struct cvec *);
*/
-static void
-leaders(struct vars * v,
- struct cvec * cv)
+static VOID
+leaders(v, cv)
+struct vars *v;
+struct cvec *cv;
{
- int mcce;
- chr *p;
- chr leader;
+ int mcce;
+ chr *p;
+ chr leader;
struct state *s;
struct arc *a;
v->mccepend = newstate(v->nfa);
NOERR();
- for (mcce = 0; mcce < cv->nmcces; mcce++)
- {
+ for (mcce = 0; mcce < cv->nmcces; mcce++) {
p = cv->mcces[mcce];
leader = *p;
- if (!haschr(cv, leader))
- {
+ if (!haschr(cv, leader)) {
addchr(cv, leader);
s = newstate(v->nfa);
newarc(v->nfa, PLAIN, subcolor(v->cm, leader),
- v->mccepbegin, s);
+ v->mccepbegin, s);
okcolors(v->nfa, v->cm);
- }
- else
- {
+ } else {
a = findarc(v->mccepbegin, PLAIN,
GETCOLOR(v->cm, leader));
assert(a != NULL);
assert(s != v->mccepend);
}
p++;
- assert(*p != 0 && *(p + 1) == 0); /* only 2-char MCCEs for
- * now */
+ assert(*p != 0 && *(p+1) == 0); /* only 2-char MCCEs for now */
newarc(v->nfa, PLAIN, subcolor(v->cm, *p), s, v->mccepend);
okcolors(v->nfa, v->cm);
}
}
/*
- * onechr - fill in arcs for a plain character, and possible case complements
+ - onechr - fill in arcs for a plain character, and possible case complements
* This is mostly a shortcut for efficient handling of the common case.
+ ^ static VOID onechr(struct vars *, pchr, struct state *, struct state *);
*/
-static void
-onechr(struct vars * v,
- chr c,
- struct state * lp,
- struct state * rp)
+static VOID
+onechr(v, c, lp, rp)
+struct vars *v;
+pchr c;
+struct state *lp;
+struct state *rp;
{
- if (!(v->cflags & REG_ICASE))
- {
+ if (!(v->cflags®_ICASE)) {
newarc(v->nfa, PLAIN, subcolor(v->cm, c), lp, rp);
return;
}
}
/*
- * dovec - fill in arcs for each element of a cvec
+ - dovec - fill in arcs for each element of a cvec
* This one has to handle the messy cases, like MCCEs and MCCE leaders.
+ ^ static VOID dovec(struct vars *, struct cvec *, struct state *,
+ ^ struct state *);
*/
-static void
-dovec(struct vars * v,
- struct cvec * cv,
- struct state * lp,
- struct state * rp)
+static VOID
+dovec(v, cv, lp, rp)
+struct vars *v;
+struct cvec *cv;
+struct state *lp;
+struct state *rp;
{
- chr ch,
- from,
- to;
- celt ce;
- chr *p;
- int i;
- color co;
+ chr ch, from, to;
+ celt ce;
+ chr *p;
+ int i;
+ color co;
struct cvec *leads;
struct arc *a;
- struct arc *pa; /* arc in prototype */
+ struct arc *pa; /* arc in prototype */
struct state *s;
- struct state *ps; /* state in prototype */
+ struct state *ps; /* state in prototype */
/* need a place to store leaders, if any */
- if (nmcces(v) > 0)
- {
+ if (nmcces(v) > 0) {
assert(v->mcces != NULL);
- if (v->cv2 == NULL || v->cv2->nchrs < v->mcces->nchrs)
- {
+ if (v->cv2 == NULL || v->cv2->nchrs < v->mcces->nchrs) {
if (v->cv2 != NULL)
free(v->cv2);
v->cv2 = newcvec(v->mcces->nchrs, 0, v->mcces->nmcces);
NOERR();
leads = v->cv2;
- }
- else
+ } else
leads = clearcvec(v->cv2);
- }
- else
+ } else
leads = NULL;
/* first, get the ordinary characters out of the way */
- for (p = cv->chrs, i = cv->nchrs; i > 0; p++, i--)
- {
+ for (p = cv->chrs, i = cv->nchrs; i > 0; p++, i--) {
ch = *p;
if (!ISCELEADER(v, ch))
newarc(v->nfa, PLAIN, subcolor(v->cm, ch), lp, rp);
- else
- {
+ else {
assert(singleton(v->cm, ch));
assert(leads != NULL);
if (!haschr(leads, ch))
addchr(leads, ch);
- }
+ }
}
/* and the ranges */
- for (p = cv->ranges, i = cv->nranges; i > 0; p += 2, i--)
- {
+ for (p = cv->ranges, i = cv->nranges; i > 0; p += 2, i--) {
from = *p;
- to = *(p + 1);
- while (from <= to && (ce = nextleader(v, from, to)) != NOCELT)
- {
+ to = *(p+1);
+ while (from <= to && (ce = nextleader(v, from, to)) != NOCELT) {
if (from < ce)
subrange(v, from, ce - 1, lp, rp);
assert(singleton(v->cm, ce));
/* deal with the MCCE leaders */
NOTE(REG_ULOCALE);
- for (p = leads->chrs, i = leads->nchrs; i > 0; p++, i--)
- {
+ for (p = leads->chrs, i = leads->nchrs; i > 0; p++, i--) {
co = GETCOLOR(v->cm, *p);
a = findarc(lp, PLAIN, co);
if (a != NULL)
s = a->to;
- else
- {
+ else {
s = newstate(v->nfa);
NOERR();
newarc(v->nfa, PLAIN, co, lp, s);
}
/* and the MCCEs */
- for (i = 0; i < cv->nmcces; i++)
- {
+ for (i = 0; i < cv->nmcces; i++) {
p = cv->mcces[i];
assert(singleton(v->cm, *p));
- if (!singleton(v->cm, *p))
- {
+ if (!singleton(v->cm, *p)) {
ERR(REG_ASSERT);
return;
}
a = findarc(lp, PLAIN, co);
if (a != NULL)
s = a->to;
- else
- {
+ else {
s = newstate(v->nfa);
NOERR();
newarc(v->nfa, PLAIN, co, lp, s);
NOERR();
}
- assert(*p != 0); /* at least two chars */
+ assert(*p != 0); /* at least two chars */
assert(singleton(v->cm, *p));
ch = *p++;
co = GETCOLOR(v->cm, ch);
- assert(*p == 0); /* and only two, for now */
+ assert(*p == 0); /* and only two, for now */
newarc(v->nfa, PLAIN, co, s, rp);
NOERR();
}
}
/*
- * nextleader - find next MCCE leader within range
+ - nextleader - find next MCCE leader within range
+ ^ static celt nextleader(struct vars *, pchr, pchr);
*/
-static celt /* NOCELT means none */
-nextleader(struct vars * v,
- chr from,
- chr to)
+static celt /* NOCELT means none */
+nextleader(v, from, to)
+struct vars *v;
+pchr from;
+pchr to;
{
- int i;
- chr *p;
- chr ch;
- celt it = NOCELT;
+ int i;
+ chr *p;
+ chr ch;
+ celt it = NOCELT;
if (v->mcces == NULL)
return it;
- for (i = v->mcces->nchrs, p = v->mcces->chrs; i > 0; i--, p++)
- {
+ for (i = v->mcces->nchrs, p = v->mcces->chrs; i > 0; i--, p++) {
ch = *p;
if (from <= ch && ch <= to)
if (it == NOCELT || ch < it)
}
/*
- * wordchrs - set up word-chr list for word-boundary stuff, if needed
- *
+ - wordchrs - set up word-chr list for word-boundary stuff, if needed
* The list is kept as a bunch of arcs between two dummy states; it's
* disposed of by the unreachable-states sweep in NFA optimization.
* Does NEXT(). Must not be called from any unusual lexical context.
* This should be reconciled with the \w etc. handling in lex.c, and
* should be cleaned up to reduce dependencies on input scanning.
+ ^ static VOID wordchrs(struct vars *);
*/
-static void
-wordchrs(struct vars * v)
+static VOID
+wordchrs(v)
+struct vars *v;
{
struct state *left;
struct state *right;
- if (v->wordchrs != NULL)
- {
- NEXT(); /* for consistency */
+ if (v->wordchrs != NULL) {
+ NEXT(); /* for consistency */
return;
}
left = newstate(v->nfa);
right = newstate(v->nfa);
NOERR();
- /* fine point: implemented with [::], and lexer will set REG_ULOCALE */
+ /* fine point: implemented with [::], and lexer will set REG_ULOCALE */
lexword(v);
NEXT();
assert(v->savenow != NULL && SEE('['));
}
/*
- * subre - allocate a subre
+ - subre - allocate a subre
+ ^ static struct subre *subre(struct vars *, int, int, struct state *,
+ ^ struct state *);
*/
static struct subre *
-subre(struct vars * v,
- int op,
- int flags,
- struct state * begin,
- struct state * end)
+subre(v, op, flags, begin, end)
+struct vars *v;
+int op;
+int flags;
+struct state *begin;
+struct state *end;
{
struct subre *ret;
ret = v->treefree;
if (ret != NULL)
v->treefree = ret->left;
- else
- {
- ret = (struct subre *) MALLOC(sizeof(struct subre));
- if (ret == NULL)
- {
+ else {
+ ret = (struct subre *)MALLOC(sizeof(struct subre));
+ if (ret == NULL) {
ERR(REG_ESPACE);
return NULL;
- }
+ }
ret->chain = v->treechain;
v->treechain = ret;
}
}
/*
- * freesubre - free a subRE subtree
+ - freesubre - free a subRE subtree
+ ^ static VOID freesubre(struct vars *, struct subre *);
*/
-static void
-freesubre(struct vars * v, /* might be NULL */
- struct subre * sr)
+static VOID
+freesubre(v, sr)
+struct vars *v; /* might be NULL */
+struct subre *sr;
{
if (sr == NULL)
return;
}
/*
- * freesrnode - free one node in a subRE subtree
+ - freesrnode - free one node in a subRE subtree
+ ^ static VOID freesrnode(struct vars *, struct subre *);
*/
-static void
-freesrnode(struct vars * v, /* might be NULL */
- struct subre * sr)
+static VOID
+freesrnode(v, sr)
+struct vars *v; /* might be NULL */
+struct subre *sr;
{
if (sr == NULL)
return;
freecnfa(&sr->cnfa);
sr->flags = 0;
- if (v != NULL)
- {
+ if (v != NULL) {
sr->left = v->treefree;
v->treefree = sr;
- }
- else
+ } else
FREE(sr);
}
/*
- * optst - optimize a subRE subtree
+ - optst - optimize a subRE subtree
+ ^ static VOID optst(struct vars *, struct subre *);
*/
-static void
-optst(struct vars * v,
- struct subre * t)
+static VOID
+optst(v, t)
+struct vars *v;
+struct subre *t;
{
if (t == NULL)
return;
}
/*
- * numst - number tree nodes (assigning retry indexes)
+ - numst - number tree nodes (assigning retry indexes)
+ ^ static int numst(struct subre *, int);
*/
-static int /* next number */
-numst(struct subre * t,
- int start) /* starting point for subtree numbers */
+static int /* next number */
+numst(t, start)
+struct subre *t;
+int start; /* starting point for subtree numbers */
{
- int i;
+ int i;
assert(t != NULL);
i = start;
- t->retry = (short) i++;
+ t->retry = (short)i++;
if (t->left != NULL)
i = numst(t->left, i);
if (t->right != NULL)
}
/*
- * markst - mark tree nodes as INUSE
+ - markst - mark tree nodes as INUSE
+ ^ static VOID markst(struct subre *);
*/
-static void
-markst(struct subre * t)
+static VOID
+markst(t)
+struct subre *t;
{
assert(t != NULL);
}
/*
- * cleanst - free any tree nodes not marked INUSE
+ - cleanst - free any tree nodes not marked INUSE
+ ^ static VOID cleanst(struct vars *);
*/
-static void
-cleanst(struct vars * v)
+static VOID
+cleanst(v)
+struct vars *v;
{
struct subre *t;
struct subre *next;
- for (t = v->treechain; t != NULL; t = next)
- {
+ for (t = v->treechain; t != NULL; t = next) {
next = t->chain;
- if (!(t->flags & INUSE))
+ if (!(t->flags&INUSE))
FREE(t);
- }
+ }
v->treechain = NULL;
- v->treefree = NULL; /* just on general principles */
+ v->treefree = NULL; /* just on general principles */
}
/*
- * nfatree - turn a subRE subtree into a tree of compacted NFAs
+ - nfatree - turn a subRE subtree into a tree of compacted NFAs
+ ^ static long nfatree(struct vars *, struct subre *, FILE *);
*/
-static long /* optimize results from top node */
-nfatree(struct vars * v,
- struct subre * t,
- FILE *f) /* for debug output */
+static long /* optimize results from top node */
+nfatree(v, t, f)
+struct vars *v;
+struct subre *t;
+FILE *f; /* for debug output */
{
assert(t != NULL && t->begin != NULL);
if (t->left != NULL)
- (DISCARD) nfatree(v, t->left, f);
+ (DISCARD)nfatree(v, t->left, f);
if (t->right != NULL)
- (DISCARD) nfatree(v, t->right, f);
+ (DISCARD)nfatree(v, t->right, f);
return nfanode(v, t, f);
}
/*
- * nfanode - do one NFA for nfatree
+ - nfanode - do one NFA for nfatree
+ ^ static long nfanode(struct vars *, struct subre *, FILE *);
*/
-static long /* optimize results */
-nfanode(struct vars * v,
- struct subre * t,
- FILE *f) /* for debug output */
+static long /* optimize results */
+nfanode(v, t, f)
+struct vars *v;
+struct subre *t;
+FILE *f; /* for debug output */
{
struct nfa *nfa;
- long ret = 0;
+ long ret = 0;
+ char idbuf[50];
assert(t->begin != NULL);
-#ifdef REG_DEBUG
if (f != NULL)
- {
- char idbuf[50];
-
fprintf(f, "\n\n\n========= TREE NODE %s ==========\n",
- stid(t, idbuf, sizeof(idbuf)));
- }
-#endif
+ stid(t, idbuf, sizeof(idbuf)));
nfa = newnfa(v, v->cm, v->nfa);
NOERRZ();
dupnfa(nfa, t->begin, t->end, nfa->init, nfa->final);
- if (!ISERR())
- {
+ if (!ISERR()) {
specialcolors(nfa);
ret = optimize(nfa, f);
}
}
/*
- * newlacon - allocate a lookahead-constraint subRE
+ - newlacon - allocate a lookahead-constraint subRE
+ ^ static int newlacon(struct vars *, struct state *, struct state *, int);
*/
-static int /* lacon number */
-newlacon(struct vars * v,
- struct state * begin,
- struct state * end,
- int pos)
+static int /* lacon number */
+newlacon(v, begin, end, pos)
+struct vars *v;
+struct state *begin;
+struct state *end;
+int pos;
{
- int n;
+ int n;
struct subre *sub;
- if (v->nlacons == 0)
- {
- v->lacons = (struct subre *) MALLOC(2 * sizeof(struct subre));
- n = 1; /* skip 0th */
+ if (v->nlacons == 0) {
+ v->lacons = (struct subre *)MALLOC(2 * sizeof(struct subre));
+ n = 1; /* skip 0th */
v->nlacons = 2;
- }
- else
- {
- v->lacons = (struct subre *) REALLOC(v->lacons,
- (v->nlacons + 1) * sizeof(struct subre));
+ } else {
+ v->lacons = (struct subre *)REALLOC(v->lacons,
+ (v->nlacons+1)*sizeof(struct subre));
n = v->nlacons++;
- }
- if (v->lacons == NULL)
- {
+ }
+ if (v->lacons == NULL) {
ERR(REG_ESPACE);
return 0;
}
}
/*
- * freelacons - free lookahead-constraint subRE vector
+ - freelacons - free lookahead-constraint subRE vector
+ ^ static VOID freelacons(struct subre *, int);
*/
-static void
-freelacons(struct subre * subs,
- int n)
+static VOID
+freelacons(subs, n)
+struct subre *subs;
+int n;
{
struct subre *sub;
- int i;
+ int i;
assert(n > 0);
for (sub = subs + 1, i = n - 1; i > 0; sub++, i--) /* no 0th */
}
/*
- * rfree - free a whole RE (insides of regfree)
+ - rfree - free a whole RE (insides of regfree)
+ ^ static VOID rfree(regex_t *);
*/
-static void
-rfree(regex_t *re)
+static VOID
+rfree(re)
+regex_t *re;
{
struct guts *g;
if (re == NULL || re->re_magic != REMAGIC)
return;
- re->re_magic = 0; /* invalidate RE */
- g = (struct guts *) re->re_guts;
+ re->re_magic = 0; /* invalidate RE */
+ g = (struct guts *)re->re_guts;
re->re_guts = NULL;
re->re_fns = NULL;
g->magic = 0;
freecm(&g->cmap);
if (g->tree != NULL)
- freesubre((struct vars *) NULL, g->tree);
+ freesubre((struct vars *)NULL, g->tree);
if (g->lacons != NULL)
freelacons(g->lacons, g->nlacons);
if (!NULLCNFA(g->search))
FREE(g);
}
-#ifdef REG_DEBUG
-
/*
- * dump - dump an RE in human-readable form
+ - dump - dump an RE in human-readable form
+ ^ static VOID dump(regex_t *, FILE *);
*/
-static void
-dump(regex_t *re,
- FILE *f)
+static VOID
+dump(re, f)
+regex_t *re;
+FILE *f;
{
+#ifdef REG_DEBUG
struct guts *g;
- int i;
+ int i;
if (re->re_magic != REMAGIC)
fprintf(f, "bad magic number (0x%x not 0x%x)\n", re->re_magic,
- REMAGIC);
- if (re->re_guts == NULL)
- {
+ REMAGIC);
+ if (re->re_guts == NULL) {
fprintf(f, "NULL guts!!!\n");
return;
}
- g = (struct guts *) re->re_guts;
+ g = (struct guts *)re->re_guts;
if (g->magic != GUTSMAGIC)
fprintf(f, "bad guts magic number (0x%x not 0x%x)\n", g->magic,
- GUTSMAGIC);
+ GUTSMAGIC);
fprintf(f, "\n\n\n========= DUMP ==========\n");
- fprintf(f, "nsub %d, info 0%lo, csize %d, ntree %d\n",
- re->re_nsub, re->re_info, re->re_csize, g->ntree);
+ fprintf(f, "nsub %d, info 0%lo, csize %d, ntree %d\n",
+ re->re_nsub, re->re_info, re->re_csize, g->ntree);
dumpcolors(&g->cmap, f);
- if (!NULLCNFA(g->search))
- {
+ if (!NULLCNFA(g->search)) {
printf("\nsearch:\n");
dumpcnfa(&g->search, f);
}
- for (i = 1; i < g->nlacons; i++)
- {
+ for (i = 1; i < g->nlacons; i++) {
fprintf(f, "\nla%d (%s):\n", i,
(g->lacons[i].subno) ? "positive" : "negative");
dumpcnfa(&g->lacons[i].cnfa, f);
}
fprintf(f, "\n");
dumpst(g->tree, f, 0);
+#endif
}
/*
- * dumpst - dump a subRE tree
+ - dumpst - dump a subRE tree
+ ^ static VOID dumpst(struct subre *, FILE *, int);
*/
-static void
-dumpst(struct subre * t,
- FILE *f,
- int nfapresent) /* is the original NFA still around? */
+static VOID
+dumpst(t, f, nfapresent)
+struct subre *t;
+FILE *f;
+int nfapresent; /* is the original NFA still around? */
{
if (t == NULL)
fprintf(f, "null tree\n");
}
/*
- * stdump - recursive guts of dumpst
+ - stdump - recursive guts of dumpst
+ ^ static VOID stdump(struct subre *, FILE *, int);
*/
-static void
-stdump(struct subre * t,
- FILE *f,
- int nfapresent) /* is the original NFA still around? */
+static VOID
+stdump(t, f, nfapresent)
+struct subre *t;
+FILE *f;
+int nfapresent; /* is the original NFA still around? */
{
- char idbuf[50];
+ char idbuf[50];
fprintf(f, "%s. `%c'", stid(t, idbuf, sizeof(idbuf)), t->op);
- if (t->flags & LONGER)
+ if (t->flags&LONGER)
fprintf(f, " longest");
- if (t->flags & SHORTER)
+ if (t->flags&SHORTER)
fprintf(f, " shortest");
- if (t->flags & MIXED)
+ if (t->flags&MIXED)
fprintf(f, " hasmixed");
- if (t->flags & CAP)
+ if (t->flags&CAP)
fprintf(f, " hascapture");
- if (t->flags & BACKR)
+ if (t->flags&BACKR)
fprintf(f, " hasbackref");
- if (!(t->flags & INUSE))
+ if (!(t->flags&INUSE))
fprintf(f, " UNUSED");
if (t->subno != 0)
fprintf(f, " (#%d)", t->subno);
- if (t->min != 1 || t->max != 1)
- {
+ if (t->min != 1 || t->max != 1) {
fprintf(f, " {%d,", t->min);
if (t->max != INFINITY)
fprintf(f, "%d", t->max);
fprintf(f, "}");
}
if (nfapresent)
- fprintf(f, " %ld-%ld", (long) t->begin->no, (long) t->end->no);
+ fprintf(f, " %ld-%ld", (long)t->begin->no, (long)t->end->no);
if (t->left != NULL)
fprintf(f, " L:%s", stid(t->left, idbuf, sizeof(idbuf)));
if (t->right != NULL)
fprintf(f, " R:%s", stid(t->right, idbuf, sizeof(idbuf)));
- if (!NULLCNFA(t->cnfa))
- {
+ if (!NULLCNFA(t->cnfa)) {
fprintf(f, "\n");
dumpcnfa(&t->cnfa, f);
fprintf(f, "\n");
}
/*
- * stid - identify a subtree node for dumping
+ - stid - identify a subtree node for dumping
+ ^ static char *stid(struct subre *, char *, size_t);
*/
-static char * /* points to buf or constant string */
-stid(struct subre * t,
- char *buf,
- size_t bufsize)
+static char * /* points to buf or constant string */
+stid(t, buf, bufsize)
+struct subre *t;
+char *buf;
+size_t bufsize;
{
/* big enough for hex int or decimal t->retry? */
- if (bufsize < sizeof(int) * 2 + 3 || bufsize < sizeof(t->retry) * 3 + 1)
+ if (bufsize < sizeof(int)*2 + 3 || bufsize < sizeof(t->retry)*3 + 1)
return "unable";
if (t->retry != 0)
sprintf(buf, "%d", t->retry);
else
- sprintf(buf, "0x%x", (int) t); /* may lose bits, that's okay */
+ sprintf(buf, "0x%x", (int)t); /* may lose bits, that's okay */
return buf;
}
-#endif /* REG_DEBUG */
-
#include "regc_lex.c"
#include "regc_color.c"
projects / wxWidgets.git / blobdiff